List of all Active Race Series & Organizers of Mud Runs, Obstacle Races, and Adventure Runs
Click on any race series name to see full details about that race and find all upcoming races.
100 Acre Challenge
100 Yard Cash
1000 Strong
3 Elements
5K For Heroes
5K The Hard Way
5Khaos
ABC Challenge
Abominable Course
Abominable Snow Race
Abominable Winter Obstacle Adventure
Acre Breaker
Active Warrior
Adohi Challenge
Aggie Obstacle Course Race
Agri-Fit Challenge
AHS Eagle Dash
Alcona Mud Run
Alpine Adventure Challenge
American Falls Farmer Fun Run
American Hero Challenge
American Ninja Warrior
Andigo Adventure Challenge
Arctic Dash
Arctic Warrior Race
Arena Run
Arkalon Assault
Armed Services YMCA Mud Run
Army Mud Assault
Arrowhead Obstacle
ASCOs Spartacus Dash
Asylum OCR
Autumn Acres
Auvergnate Extreme
AXA Hearts In Action
Aztec Escape
Back 2 The Trenches
Badass Dash
Badass Mucker
BAE Mini Mudder
Bantam Jeep
Barbarian Challenge
Barber Beast on the Bay
Battle Buddy Run
Battle OCR
Battle of Lansdown
Battle of the Knights
Battle on Buffett Beach
Battle Run Soliders
Battlefield Challenge
Battlemud Laurens County
BattleRush
Beach and Brew Run
Beach Ballistic
Bear Crawl
Bear Grylls Survival Race
Beast OCR Challenge PR
Beast of the East Fork
Beasts OCR
Beloit Dirty Dash
Bermuda Triple Challenge
Berserker Battle OCR
Bethesda Mud Run
BG Gauntlet Mud Run
Big Dawg Dare
Big Dirty Run
Big Dog Brag
Big House Breakout
Big House Legionnaire Mud Challenge
Big Muddy Challenge
Big Nasty Mud Run
Big Red Challenge
Bigfoot Challenge
Bigfoots Legend
Billabong Ranch Brumby Run
Bing Blazer
Birch Hall Adventures
Bison Race
Black Diamond Obstacle
Black Swamp Runner
Blaster Run
BlitzFitMe Extreme Fitness Challenge
Blizzard Blast
Blizzard Run
Blood and Guts
Blue Ridge Mountain Mudurance
Bluff Mudder
Bog Commander
Bold r Dash
BoneFrog Challenge
Boot Camp 5K Race Challenge
Bootcamp Challenge
Born Survivor
Bounce And Not Break
Brainiac Obstacle Course
Brampton Tough Run
Braveheart Race
Bravus Race
Breakout Run
Brewser Adventure Race
Brian R Bill Memorial Challenge
Bridging Abilities Obstacle Challenge
Brutal 10
BRUTAL Run
Buccaneer Rampage
Burpeemeile
Bush Farm OCR
Cacique Jumacao
Cairo Runners
Call of Valhalla
Camel Crawl
Camp Fuji Mud Run
Camp Gladiator
Camp Winona Mud Fest
Cannonball Mud Run
Cannonball Rush
Canton Lions Urban Assault
Capital High School Dirty Leprechaun
Case Creek Obstacle Mud Run
Catfish Crawl
Caveman Adventure Run
Cavemanrun Obstacle Run
CBD Stampede
Celtic Warrior Challenge
Cerus
Chain Runner
Challenged Champions
Chamblee Family Fun Mudder
Champion Dash
Charenji
Chase The Wolf
Chaseburg Snowtrailer
Cheadle Challenge Adventure Run
Chepstow Bounce 4 Charity
Chepstow Stampede
Cherokee Challenge
Childrenz Challenge
Chino Mudder
Choung Race
Chow Challenge
Chuong Race
City Challenge Obstacle Race
City of Westminster
Color Obstacle Rush
Commando Series
Conquer the Gauntlet
Conquer the King
Cougars Mud Run
Country Mile 5K
Countryman Challenge
Course Extreme
Crazy Mud Mayhem
Creek Crawl
Croghan Hill Challenge
Cross Country Stampede
Crossfit Huntsville
crossXrace
Crucible Obstacle Course Race
Crusher Race
Cumberland County Fair
Da Dells Dirtiest Dash
Daniel Barden Highland Mudfest
Dash or Crash
Dauntless Primal Assault
Dayton Muddler
Dead End Race
Defenders of Liberty Mud Run
Defiance Extreme Trail Run
Del Mar Mud Run
Delaware Farm Mudder
Delaware Mud Run
Delmarva Dirt Dash
Delta Dash
Desafio Braves
Desafio de Guerrero
Desert Mud Dash
Desert Veterans of Wisconsin
Desert Viking Challenge
Desert Warrior Challenge
Desert Warrior Challenge AZ
Devil Mud Run
Devils Circuit
Diamond Hollow Mud Run
Dirt Runner
Dirt Wars Survivor
Dirty Beach Mud Run
Dirty Bird Mud Run
Dirty Bird Run
Dirty Devil Stampede
Dirty Dog Dash
Dirty Donkey Mud Run
Dirty Hero
Dirty Leprechaun
DogHill K9 Iron Dog
Dorians Challenge
Down and Dirty Obstacle Course
Dragon OCR
Dropzone Gunner
Duellator
Durham Muddy Mayhem
Edge Muck Run
Edge the Ledge
Ellsworth Air Force Base Mud Run
Emerald Coast MudRun
emPowered OCR
End Hunger
Endure For The Cure
Endure the Dirt
Energy Adventure Challenge
Enfer Vert
EPD Evansville Police Department Foundation
Epic Mud Maze
EPIC Series
ERX Extreme
Evansville Police Department Foundation
Explore the Mud
Extreme Challenge
Extreme Warrior Mud Run
EXXtreme Female Race
Eyman Mud Run
Farinato Race
Farm Crawl 5K
Farm Run
Farmageddon Run
FieldDaze
Filthy Five K
Fin Fun Mud Run
Finger Lakes Mud Run
Finn McCool
Firemans Mud Run
Fishermans Friend StrongmanRun
FIT Challenge
Fit Dash Challenge
Fit Families Mud Run
FIT Panther Challenge
Fitness 4 Focus
Five O Fitness
Five-O
ForeShore Adventure Run
Forest Fitness Mudmayhem
Forest Warrior
Fort Drum BOSS
Fort McCoy Army Mud Assault
Four Seasons Mud Run
Fox Run
Foxes Farm Mud Run
FrankenMudder
Franklin Lions Tuff Run
Freak N Farmer
Fredericktown JROTC Mud Run
Frontline OCR
Fun In The Sun
Fuse Warrior Obstacle Course
Gaelforce Events
Gallatin Recon Run
Gallup Mud Run
Garden City Siege
Gauntlet Races
Gauntlet Trail Run
Gaylord Gauntlet
Gelt Gladiator
Get Caked
Get To Muck
Getting Tough Race
Gimme Smore Mud Run
GitEr Done Mud Run
Glack Attack
Gladiator Assault Challenge
Gladiator Dash
Gladiator Rock n Run
Gladiator Run
Glencoe Great Mud Run
Go Nutts
GoFeral
Goliath at the Gorge
Goliath Gauntlet
Goliathon
Gonka Gladiatorov
Good Clean Fun Mud Run
Goodwill Mud Run
Goppin Challenge
GoPro Mountain Games
Gorgo Race
GORUCK
Grail Quest
Grand Rapids Mud Run
Grapes of Wrath
Gray Mud Run
Great American Hero
Great Auburn Obstacle Race
Great Bend Tuff Enuff
Great Harvest Challenge
Great Kaw Adventure Race
Great Pumpkin Haul
Great SMore Mud Run
Greece Gauntlet
Green Beret Challenge
Green Beret Gut Check
Green Mountain Iron Dog
Gretna Gritty
Grit Games
Grit League
Grit N Wit
Grit OCR
Gritty Chix Mud Run
Gritty Goddess
Gropen Extreme
Growing Great Kids Adventure Race
Guardians Gauntlet
Gung Ho
Gut Check Fitness
Habitat Mud Run
Hammer Race
Hang On Run
Hannibal Race
HappyFest
Hard as Oak
Hardcore Mudd Run
Hardship Hill
Heart Challenge
Hell and Back
Hell in the Harbour
HellRunner
Hero Challenge
Hero Mud Run
Heroes Challenge
High Desert Mud Run
100 Yard Cash
1000 Strong
3 Elements
5K For Heroes
5K The Hard Way
5Khaos
ABC Challenge
Abominable Course
Abominable Snow Race
Abominable Winter Obstacle Adventure
Acre Breaker
Active Warrior
Adohi Challenge
Aggie Obstacle Course Race
Agri-Fit Challenge
AHS Eagle Dash
Alcona Mud Run
Alpine Adventure Challenge
American Falls Farmer Fun Run
American Hero Challenge
American Ninja Warrior
Andigo Adventure Challenge
Arctic Dash
Arctic Warrior Race
Arena Run
Arkalon Assault
Armed Services YMCA Mud Run
Army Mud Assault
Arrowhead Obstacle
ASCOs Spartacus Dash
Asylum OCR
Autumn Acres
Auvergnate Extreme
AXA Hearts In Action
Aztec Escape
Back 2 The Trenches
Badass Dash
Badass Mucker
BAE Mini Mudder
Bantam Jeep
Barbarian Challenge
Barber Beast on the Bay
Battle Buddy Run
Battle OCR
Battle of Lansdown
Battle of the Knights
Battle on Buffett Beach
Battle Run Soliders
Battlefield Challenge
Battlemud Laurens County
BattleRush
Beach and Brew Run
Beach Ballistic
Bear Crawl
Bear Grylls Survival Race
Beast OCR Challenge PR
Beast of the East Fork
Beasts OCR
Beloit Dirty Dash
Bermuda Triple Challenge
Berserker Battle OCR
Bethesda Mud Run
BG Gauntlet Mud Run
Big Dawg Dare
Big Dirty Run
Big Dog Brag
Big House Breakout
Big House Legionnaire Mud Challenge
Big Muddy Challenge
Big Nasty Mud Run
Big Red Challenge
Bigfoot Challenge
Bigfoots Legend
Billabong Ranch Brumby Run
Bing Blazer
Birch Hall Adventures
Bison Race
Black Diamond Obstacle
Black Swamp Runner
Blaster Run
BlitzFitMe Extreme Fitness Challenge
Blizzard Blast
Blizzard Run
Blood and Guts
Blue Ridge Mountain Mudurance
Bluff Mudder
Bog Commander
Bold r Dash
BoneFrog Challenge
Boot Camp 5K Race Challenge
Bootcamp Challenge
Born Survivor
Bounce And Not Break
Brainiac Obstacle Course
Brampton Tough Run
Braveheart Race
Bravus Race
Breakout Run
Brewser Adventure Race
Brian R Bill Memorial Challenge
Bridging Abilities Obstacle Challenge
Brutal 10
BRUTAL Run
Buccaneer Rampage
Burpeemeile
Bush Farm OCR
Cacique Jumacao
Cairo Runners
Call of Valhalla
Camel Crawl
Camp Fuji Mud Run
Camp Gladiator
Camp Winona Mud Fest
Cannonball Mud Run
Cannonball Rush
Canton Lions Urban Assault
Capital High School Dirty Leprechaun
Case Creek Obstacle Mud Run
Catfish Crawl
Caveman Adventure Run
Cavemanrun Obstacle Run
CBD Stampede
Celtic Warrior Challenge
Cerus
Chain Runner
Challenged Champions
Chamblee Family Fun Mudder
Champion Dash
Charenji
Chase The Wolf
Chaseburg Snowtrailer
Cheadle Challenge Adventure Run
Chepstow Bounce 4 Charity
Chepstow Stampede
Cherokee Challenge
Childrenz Challenge
Chino Mudder
Choung Race
Chow Challenge
Chuong Race
City Challenge Obstacle Race
City of Westminster
Color Obstacle Rush
Commando Series
Conquer the Gauntlet
Conquer the King
Cougars Mud Run
Country Mile 5K
Countryman Challenge
Course Extreme
Crazy Mud Mayhem
Creek Crawl
Croghan Hill Challenge
Cross Country Stampede
Crossfit Huntsville
crossXrace
Crucible Obstacle Course Race
Crusher Race
Cumberland County Fair
Da Dells Dirtiest Dash
Daniel Barden Highland Mudfest
Dash or Crash
Dauntless Primal Assault
Dayton Muddler
Dead End Race
Defenders of Liberty Mud Run
Defiance Extreme Trail Run
Del Mar Mud Run
Delaware Farm Mudder
Delaware Mud Run
Delmarva Dirt Dash
Delta Dash
Desafio Braves
Desafio de Guerrero
Desert Mud Dash
Desert Veterans of Wisconsin
Desert Viking Challenge
Desert Warrior Challenge
Desert Warrior Challenge AZ
Devil Mud Run
Devils Circuit
Diamond Hollow Mud Run
Dirt Runner
Dirt Wars Survivor
Dirty Beach Mud Run
Dirty Bird Mud Run
Dirty Bird Run
Dirty Devil Stampede
Dirty Dog Dash
Dirty Donkey Mud Run
Dirty Hero
Dirty Leprechaun
DogHill K9 Iron Dog
Dorians Challenge
Down and Dirty Obstacle Course
Dragon OCR
Dropzone Gunner
Duellator
Durham Muddy Mayhem
Edge Muck Run
Edge the Ledge
Ellsworth Air Force Base Mud Run
Emerald Coast MudRun
emPowered OCR
End Hunger
Endure For The Cure
Endure the Dirt
Energy Adventure Challenge
Enfer Vert
EPD Evansville Police Department Foundation
Epic Mud Maze
EPIC Series
ERX Extreme
Evansville Police Department Foundation
Explore the Mud
Extreme Challenge
Extreme Warrior Mud Run
EXXtreme Female Race
Eyman Mud Run
Farinato Race
Farm Crawl 5K
Farm Run
Farmageddon Run
FieldDaze
Filthy Five K
Fin Fun Mud Run
Finger Lakes Mud Run
Finn McCool
Firemans Mud Run
Fishermans Friend StrongmanRun
FIT Challenge
Fit Dash Challenge
Fit Families Mud Run
FIT Panther Challenge
Fitness 4 Focus
Five O Fitness
Five-O
ForeShore Adventure Run
Forest Fitness Mudmayhem
Forest Warrior
Fort Drum BOSS
Fort McCoy Army Mud Assault
Four Seasons Mud Run
Fox Run
Foxes Farm Mud Run
FrankenMudder
Franklin Lions Tuff Run
Freak N Farmer
Fredericktown JROTC Mud Run
Frontline OCR
Fun In The Sun
Fuse Warrior Obstacle Course
Gaelforce Events
Gallatin Recon Run
Gallup Mud Run
Garden City Siege
Gauntlet Races
Gauntlet Trail Run
Gaylord Gauntlet
Gelt Gladiator
Get Caked
Get To Muck
Getting Tough Race
Gimme Smore Mud Run
GitEr Done Mud Run
Glack Attack
Gladiator Assault Challenge
Gladiator Dash
Gladiator Rock n Run
Gladiator Run
Glencoe Great Mud Run
Go Nutts
GoFeral
Goliath at the Gorge
Goliath Gauntlet
Goliathon
Gonka Gladiatorov
Good Clean Fun Mud Run
Goodwill Mud Run
Goppin Challenge
GoPro Mountain Games
Gorgo Race
GORUCK
Grail Quest
Grand Rapids Mud Run
Grapes of Wrath
Gray Mud Run
Great American Hero
Great Auburn Obstacle Race
Great Bend Tuff Enuff
Great Harvest Challenge
Great Kaw Adventure Race
Great Pumpkin Haul
Great SMore Mud Run
Greece Gauntlet
Green Beret Challenge
Green Beret Gut Check
Green Mountain Iron Dog
Gretna Gritty
Grit Games
Grit League
Grit N Wit
Grit OCR
Gritty Chix Mud Run
Gritty Goddess
Gropen Extreme
Growing Great Kids Adventure Race
Guardians Gauntlet
Gung Ho
Gut Check Fitness
Habitat Mud Run
Hammer Race
Hang On Run
Hannibal Race
HappyFest
Hard as Oak
Hardcore Mudd Run
Hardship Hill
Heart Challenge
Hell and Back
Hell in the Harbour
HellRunner
Hero Challenge
Hero Mud Run
Heroes Challenge
High Desert Mud Run
High Desert Mud Splash
High Rock Challenge
Highland Run
Highlander Assault
Hillbilly Hike
Hillbilly Mud Run
Hillybilly Havoc
HMB Pumpkin Run
Hogwaller Mud Run
Holiday Valley Mudslide
Hollard JURA
Hollis Adams Mud Run
Holme Howler
Holy Grit
Horseshoe Bend OCR
Huff And Puff Racing
Hulltimate Challenge
Hunterdon County YMCA
Hurricane Mud Run
I AM Strong
Iceman Run
Ignite Fitness
IHM Spartan
IMPI Challenge Obstacle Trail Run
In Cold Mud
In Tents Mud Run
Independence Pioneer Mud Run
Independent Ninja Warrior Events
Indian Mud Run
Inferno Run
Inn Run
Insandity
Insane Terrain Running
Invictus
Invncbl
Iron Runner
IronRun
Irvine Lake
ISU Ambush
Jacksplace Gauntlet Games
Jail Break Challenge
Jail Break Mud Challenge
JCB Mud Run
Jefferson City Prison Break
Joint Base Lewis-McChord
Jonestown KOA Heros Challenge
Judgement Day
Jump Climb Extreme
Jump Duck Run
Just For The Mud of It
K9 Gladiators
Kaikoura Warrior
Kalamazoo Mud Run
Kansas City Dirty Duo
Kapow Superhero Challenge
Katharine House Hospice
KC Timber Challenge
Kentucky Mudfest
Kernow Killer
Kickass Endurance
Kids Adventure Games
Kids Obstacle Challenge
Killer Race
Killinkere MudVenture
Kitimat Mud Games
Knight Race
Knoxville Marine Mud Run
Knuckle Buster Obstacle Challenge
KONQER Obstacle Race
Krell Adventure Games
Kryptonite Challenge
La Batalla Race
Lake Barkley Warrior Challenge
Lanrick Challenge
Laser Run
Le defi forestier
Left Right Repeat
Legend Race
Legion Run
Lewy Goodes Scouting For Fitness
LHK Canine Mud Run
Liberty Dash
Like A Boss Mud Run
Lil Mud Runner
Lions Chase
Little Rocks Dirtiest 5K
Lloydminster Muck Run
Loko Bandito Obstacle Run
Loon Mountain
Lords Gym Mud Run
Luray MUDtoberfest
MacTuff
Mad Anthony Mud Run
Mad Cow Mud Run
Mad March Hare
Mad Max Mud Run
Mad Mountain Mud Run
Mad Mudder Mud Run
Mad Warrior
Magnuson Series
Makahiki Challenge
Man Meets Mud
Man VS Mountain
Manor Mud Run
March Madness Mud Run
Maricopa Mud Run
Marietta YMCA
Marine Corps Marathon
Marine Corps Mud Run
Marine Mud Challenge
Marine Mud Run
Marion Made Challenge
Marylands Finest Fitness Challenge
Maunga Mayhem
Mayhem
Mayo Mud Run
MCB Camp Lejeune USAA Grand Prix
McClean Fire Department
MCCS Lejeune New River
MCCS Okinawa
Medieval Rush
Medina Mud Run
Mega Bounce Run
Memorial Beach Challenge
Mercenary Wars
Metro Parks Tacoma Mud Run
Metroflex OCR
Michigan Adventure Race
Michigan Man vs Mountain
Mighty Deerstalker
Mighty Mud Dash
Mighty Mudder
Mighty Titan Adventures
Mini Muckers
Mission Mud
Mission Run
Mississippi Mud Run
Mississippi Mudder
MIT Tough Team
Mogollon Monster Mudder
Monaca Fire Department
Montevallo Warrior Challenge
Morgans Mud Gauntlet
Mountain Grind
Mountain Mud Sling
Mountain Mudder
MountainQuest OCR
MSMS Bull Rush
Muck It
Muck MS
MuckFest
MuckRuckus MS
Muckstock
Mucky Races
Mud and Chocolate
Mud and Guts Challenge
Mud and Muck Aid for Africa
Mud and Sweat Mud Run
Mud And War Run
Mud Dog Run
Mud Endeavor
Mud Factor
Mud Gauntlet
Mud Happens
Mud Hero
Mud Kids
Mud Madness 150
Mud Masters
Mud Mayhem
Mud Monster Mud Rush
Mud Monsters Run
Mud Muster
Mud n Buds
Mud Nation
Mud Ninja
Mud on the Mountain
Mud Pack Challenge
Mud Run For Heart
Mud Run Mayhem
Mud Run on the Farm
Mud Stash
Mud Sweat and Cheers
Mud Titan
MudCraft
Mudd, Sweat and Tears
Mudders Day Madness
Muddy ACCE Race
Muddy Angel Run
Muddy Bloody Run
Muddy Bottom Crazy Mud Run
Muddy Buffalo
Muddy Bull Run
Muddy Dash
Muddy Dog Challenge
Muddy Dog Treks
Muddy Duck Dash
Muddy Furlong
Muddy Good Run
Muddy Grape
Muddy Hell
Muddy Leprechaun
Muddy Mammoth
Muddy Mayhem
Muddy Miler Family Adventure
Muddy Princess
Muddy Trials Original
Muddy Turkey
Muddy Warrior
Muddy Warriors Xperience
MuddyUp 5k Race
MudGirl Run
Mudman Race
Mudmoiselle
MudStock Race
MudZilla Mud Run
MudZilla Run
Mukwonago YMCA Family Mud Run
Murder Creek Run
Musacchio Mud Mountain Challenge
Muscle Acre
Muscle Thru Mulberry
Mustang Mudder
My Muddy Valentine
Naki Run Amuck
Nash Ranch Mud Mash
National Ninja League
Native X Race
Nature Ninja
NBVC Mud Run
NCC Mud Run
Nebraska Mud Run
New England Gold
Newbsanity
Newcastle Stampede
Niagara Mudfest
Niangua Monster Dash
Nightmare Challenge
Ninth Region
No Bull OCR Challenge
No Ego Challenge
No Mans Land Trench Run
Nordic Race
North American OCR Championships
Northwoods Bad Dash
NTB Mud Run
Nuclear Races
O2X Summit Challenges
Oak Runner Trail Run
Obstacool
ObstaSplash
OCPR Down Dirty
OCR Battlegrounds
OCR EC
OCR European Championships
OCR Throwdown
OCR World Championships
October Mudfest
Ohana Mudder
Oklahoma Zombie Run
Old Ironsides Mud Challenge
Oldham Down and Dirty
Oles Assault
One True Grit
Only the Brave
Operation Warzone
Operation XLR8
Optimal Form Warrior Race
Oregon Running Dirty
Original Gram
Orphan Love Mud Run
Outbreak Zombie Run
Overcomer Obstacle Challenge
Overload
Pampa Mudtober
Panic In The Dark
Panther Run
Parkinsons UK Muddy Mission
Patriot Highlander Challenge
Patriot Run
Paul Bunyan Extreme 5K
Pawpaw Gauntlet Run
Pensacola Mud Run
Phoenix Evolution
Phoenix Race OCR
Pig Trail Mud Run
Pike Firemans Challenge
Pineapple Classic
Pirate Plunge Mud Run
Pirate Zombie Mud Run
Play Dirty Adventure Run
Polar Hero Winter Obstacle Race
Polar Rush
Police Fitness Challenge
Polson Mud Run
Pompano Beach Fitness Race
Portage the Prairies
Powhatan Warrior Run
Prime Four Beast Race
Prison Break Race
PSU Gorilla Dash
Puck In The Park
Puerto Rico Survivor Race
Pukka Races
Pumpkin Patch Mud Run
Push It for the Peace
Race Day at Augustine School
Race For a Reason
Race For Kids
Race for Life Pretty Muddy
Race MT
Race Nation
Race Roll Dye
Race the Tide
Rad Dogs Mud Run
Ragged Mountain Scuttle
Raiders Of The Lost Park
Rail Trail Fun Run Fever
Raleigh Zombie Escape
Ram Run
Rat Race
Raw Challenge
RC Mudders
Rea Palus Race
Reach The Peak NH
Reaper Event
Recovery International
High Rock Challenge
Highland Run
Highlander Assault
Hillbilly Hike
Hillbilly Mud Run
Hillybilly Havoc
HMB Pumpkin Run
Hogwaller Mud Run
Holiday Valley Mudslide
Hollard JURA
Hollis Adams Mud Run
Holme Howler
Holy Grit
Horseshoe Bend OCR
Huff And Puff Racing
Hulltimate Challenge
Hunterdon County YMCA
Hurricane Mud Run
I AM Strong
Iceman Run
Ignite Fitness
IHM Spartan
IMPI Challenge Obstacle Trail Run
In Cold Mud
In Tents Mud Run
Independence Pioneer Mud Run
Independent Ninja Warrior Events
Indian Mud Run
Inferno Run
Inn Run
Insandity
Insane Terrain Running
Invictus
Invncbl
Iron Runner
IronRun
Irvine Lake
ISU Ambush
Jacksplace Gauntlet Games
Jail Break Challenge
Jail Break Mud Challenge
JCB Mud Run
Jefferson City Prison Break
Joint Base Lewis-McChord
Jonestown KOA Heros Challenge
Judgement Day
Jump Climb Extreme
Jump Duck Run
Just For The Mud of It
K9 Gladiators
Kaikoura Warrior
Kalamazoo Mud Run
Kansas City Dirty Duo
Kapow Superhero Challenge
Katharine House Hospice
KC Timber Challenge
Kentucky Mudfest
Kernow Killer
Kickass Endurance
Kids Adventure Games
Kids Obstacle Challenge
Killer Race
Killinkere MudVenture
Kitimat Mud Games
Knight Race
Knoxville Marine Mud Run
Knuckle Buster Obstacle Challenge
KONQER Obstacle Race
Krell Adventure Games
Kryptonite Challenge
La Batalla Race
Lake Barkley Warrior Challenge
Lanrick Challenge
Laser Run
Le defi forestier
Left Right Repeat
Legend Race
Legion Run
Lewy Goodes Scouting For Fitness
LHK Canine Mud Run
Liberty Dash
Like A Boss Mud Run
Lil Mud Runner
Lions Chase
Little Rocks Dirtiest 5K
Lloydminster Muck Run
Loko Bandito Obstacle Run
Loon Mountain
Lords Gym Mud Run
Luray MUDtoberfest
MacTuff
Mad Anthony Mud Run
Mad Cow Mud Run
Mad March Hare
Mad Max Mud Run
Mad Mountain Mud Run
Mad Mudder Mud Run
Mad Warrior
Magnuson Series
Makahiki Challenge
Man Meets Mud
Man VS Mountain
Manor Mud Run
March Madness Mud Run
Maricopa Mud Run
Marietta YMCA
Marine Corps Marathon
Marine Corps Mud Run
Marine Mud Challenge
Marine Mud Run
Marion Made Challenge
Marylands Finest Fitness Challenge
Maunga Mayhem
Mayhem
Mayo Mud Run
MCB Camp Lejeune USAA Grand Prix
McClean Fire Department
MCCS Lejeune New River
MCCS Okinawa
Medieval Rush
Medina Mud Run
Mega Bounce Run
Memorial Beach Challenge
Mercenary Wars
Metro Parks Tacoma Mud Run
Metroflex OCR
Michigan Adventure Race
Michigan Man vs Mountain
Mighty Deerstalker
Mighty Mud Dash
Mighty Mudder
Mighty Titan Adventures
Mini Muckers
Mission Mud
Mission Run
Mississippi Mud Run
Mississippi Mudder
MIT Tough Team
Mogollon Monster Mudder
Monaca Fire Department
Montevallo Warrior Challenge
Morgans Mud Gauntlet
Mountain Grind
Mountain Mud Sling
Mountain Mudder
MountainQuest OCR
MSMS Bull Rush
Muck It
Muck MS
MuckFest
MuckRuckus MS
Muckstock
Mucky Races
Mud and Chocolate
Mud and Guts Challenge
Mud and Muck Aid for Africa
Mud and Sweat Mud Run
Mud And War Run
Mud Dog Run
Mud Endeavor
Mud Factor
Mud Gauntlet
Mud Happens
Mud Hero
Mud Kids
Mud Madness 150
Mud Masters
Mud Mayhem
Mud Monster Mud Rush
Mud Monsters Run
Mud Muster
Mud n Buds
Mud Nation
Mud Ninja
Mud on the Mountain
Mud Pack Challenge
Mud Run For Heart
Mud Run Mayhem
Mud Run on the Farm
Mud Stash
Mud Sweat and Cheers
Mud Titan
MudCraft
Mudd, Sweat and Tears
Mudders Day Madness
Muddy ACCE Race
Muddy Angel Run
Muddy Bloody Run
Muddy Bottom Crazy Mud Run
Muddy Buffalo
Muddy Bull Run
Muddy Dash
Muddy Dog Challenge
Muddy Dog Treks
Muddy Duck Dash
Muddy Furlong
Muddy Good Run
Muddy Grape
Muddy Hell
Muddy Leprechaun
Muddy Mammoth
Muddy Mayhem
Muddy Miler Family Adventure
Muddy Princess
Muddy Trials Original
Muddy Turkey
Muddy Warrior
Muddy Warriors Xperience
MuddyUp 5k Race
MudGirl Run
Mudman Race
Mudmoiselle
MudStock Race
MudZilla Mud Run
MudZilla Run
Mukwonago YMCA Family Mud Run
Murder Creek Run
Musacchio Mud Mountain Challenge
Muscle Acre
Muscle Thru Mulberry
Mustang Mudder
My Muddy Valentine
Naki Run Amuck
Nash Ranch Mud Mash
National Ninja League
Native X Race
Nature Ninja
NBVC Mud Run
NCC Mud Run
Nebraska Mud Run
New England Gold
Newbsanity
Newcastle Stampede
Niagara Mudfest
Niangua Monster Dash
Nightmare Challenge
Ninth Region
No Bull OCR Challenge
No Ego Challenge
No Mans Land Trench Run
Nordic Race
North American OCR Championships
Northwoods Bad Dash
NTB Mud Run
Nuclear Races
O2X Summit Challenges
Oak Runner Trail Run
Obstacool
ObstaSplash
OCPR Down Dirty
OCR Battlegrounds
OCR EC
OCR European Championships
OCR Throwdown
OCR World Championships
October Mudfest
Ohana Mudder
Oklahoma Zombie Run
Old Ironsides Mud Challenge
Oldham Down and Dirty
Oles Assault
One True Grit
Only the Brave
Operation Warzone
Operation XLR8
Optimal Form Warrior Race
Oregon Running Dirty
Original Gram
Orphan Love Mud Run
Outbreak Zombie Run
Overcomer Obstacle Challenge
Overload
Pampa Mudtober
Panic In The Dark
Panther Run
Parkinsons UK Muddy Mission
Patriot Highlander Challenge
Patriot Run
Paul Bunyan Extreme 5K
Pawpaw Gauntlet Run
Pensacola Mud Run
Phoenix Evolution
Phoenix Race OCR
Pig Trail Mud Run
Pike Firemans Challenge
Pineapple Classic
Pirate Plunge Mud Run
Pirate Zombie Mud Run
Play Dirty Adventure Run
Polar Hero Winter Obstacle Race
Polar Rush
Police Fitness Challenge
Polson Mud Run
Pompano Beach Fitness Race
Portage the Prairies
Powhatan Warrior Run
Prime Four Beast Race
Prison Break Race
PSU Gorilla Dash
Puck In The Park
Puerto Rico Survivor Race
Pukka Races
Pumpkin Patch Mud Run
Push It for the Peace
Race Day at Augustine School
Race For a Reason
Race For Kids
Race for Life Pretty Muddy
Race MT
Race Nation
Race Roll Dye
Race the Tide
Rad Dogs Mud Run
Ragged Mountain Scuttle
Raiders Of The Lost Park
Rail Trail Fun Run Fever
Raleigh Zombie Escape
Ram Run
Rat Race
Raw Challenge
RC Mudders
Rea Palus Race
Reach The Peak NH
Reaper Event
Recovery International
Red Bull Quicksand
Red Dirt Mud Run
Redrun
Relish Running Races
Renegade Obstacle Race
Renegade Rage
Renegade Run
Republic Mud Run
Reviver Challenge
Rise Challenge Events
Rise Up Challenge
Robo Mud Run
ROC Argentina
Rock of Hell
Rocket Race
Rockfish Adventure Run
Rockin the Desert
Rodneys Off Road Challenge
Rogue Alpha Rush
Rood Rampage
Rough Events
Rough N Tough Mudder
Rough Runner
Royal Marines Commando Challenge
Royal Mud Man
Rubicon Race
Ruff Dugger
Ruff Mudder
Ruff Rampage
Ruff Run
Ruffin Mudder
Rugged Maniac
Rugged Ranch Run
Rugged Runner Challenge
Run Amuck
Run Dirty BahamaHealth Mud Run
Run Down The Demons
Run For Our Lives
Run for your Freakn Life
Run Lizard Creek
Run Mucker Run
Run of the Dead
Run Rampage
Run Steeplechase
Run the Gauntlet
Run the Hook
Run the Jailbreak
Run the Rails
Run The Ridge
Run the Rock
Run Wild Chile
Runamuck Challenge
Runmageddon
Running Dead KC
Running Warriors
Running Wild Race
RunZilla
RV Devil Dash
RX1 Nation
Samson Challenge
Samurai Sprint Mud Run
Sand and Misery Challenge
Savage Adventure Race
Savage Dash
Savage Race
SBSD Mud Run
Seabee Volkslauf Mud Run
Seamark Mudder
September Scramble
Shadeys Rugged Run
Shadow Ranch
Shark Life OCR
Shasta Mud Run
Shropshire Mud Run
SISU Endurance
Sisu Grit
Skibbereen Down and Dirty Adventure Challenge
SLO Ultra
Slop Hop
SMA Trust Mud Run
Soldier Dash
Soldier Rush
Soul Crusher
Sound View Camp Mud Run
South West Mudfest
Sparta Mud Run
Spartan Race
Special Operators Challenge
Sperunking Sandmine Challenge
Splat Jr Mud Run
Splat Quack GO
Sport Tasman Marlborough Muddy Buddy
St Giles Hospice Mud Challenge
St Lukes Hospice Mud Run
St. Patrick Mud Run
Stadium Blitz
Stampede Adventure Run
Stars and Scars
Steel City Showdown
Sterling House Down and Dirty
Stony Lonesome Mud Run
Stop Drop and Mud
Storm the Beach
Storm The Castle
Strong Viking
Stronger Women Stronger World
Suck It Up Buttercup
Suffolk Whole Hog
Summit Survivor
Summit To Swamp Mud Run
Sundown Mountain
Sunriver March Mudness
Super Hero Obstacle Race
Super Human Challenge
Superhero Dash
Survival of the Fittest
Survival Race
Survival Race
Survival Run
Survivor Mud Run
Survivor Race
Survivor Race UK
Swain Swamp Stomp
Swamp and Stomp Mud Run
Swamp Battle OCR
Swamp Challenge
Swamp Stomp 4 Mile
Swampfoot 4 Mile
Swan Creek Mud Run
Sweeney Mud Run
Tackle the Tar
Tactical Titan
Talahi Adventure Dash
Tame The Terrain
TARUC Obstacle Course Race
Tater Dash
Taurus 200
TEAAM Mud Run for Autism
Teach First Wolf Run
Teen Missions Mud Run
Tehama Tough Mud Run
Telegram & Gazette Woo Challenge
Terrain Racing
Terrier Tough
Teton Valley Mudzilla
Texas Warrior Mudout
The 5K Foam Fest
The 5k Zombie Run
The AhMazing Race
The Battlegrounds
The Beast Run
The Charity Challenge
The Color Run
The Dirty Dash
The Dirty Leprechaun
The Dirty Monty
The Elements OCR
The Gauntlet Games
The Gauntlet Race
The General
The Great Escape
The Grind
The Grizzly and Cub Run
The Holt Bolt
The Ice Cream Race
The Inflatable Run
The Jungle NI
The Little Welly Goes Wild
The Lumberjack Race
The Muck Of Kells
The Mud Day
The Mudnificent Seven
The Nuts Challenge
The Original Mud Run
The Pack Games
The Pursuit Games
The Puzzle Dash
The Rec Trek
The Ridge Run
The Rocket Gauntlet
The Swanbourne Endeavour
The Titan Run
The Zombie Dash
Theos Obstacle 5K
Thomas College Dirty Dog Mud Run
THOR
Thunder Run
ThunderDash
Tiger Band Zombie Run
Tiger Escapade
Tippy Mud Run
Titan Macquarie Mud Run
Titans Challenge
Titans Race
TK Gator Grind
Tomahawk Tromp
Tonka Mud Run
Total Warrior
Tough Cookie Adventure Race
Tough Cookie Mud Run
Tough Enough
Tough Gator
Tough Guy
Tough Kid Challenge
Tough Mudder
Tough Race
Tough Viking
Toughest
Tower Hill Challenge
TPK Endurance
Transylvania Adventure Games
Trash Dash 5K
TRENCH Challenge
Tri Forces Mud Run
TRIAD
Tribal Challenge
Tribal Waters
Trojan Challenge
Trolljegerproven
True Grit
True North Tough
Tuff Muck Challenge
Tuff Scramblers
TugMudder Adventure Run
Tvrdak
Twisted Steel OCR
Tyndall AFB The Running Dead
Udderly Muddy Rugged Run
Uff Da Challenge
Uff Da Mud Run
Ultimate Fitness Run
Ultimate Ninja Athlete Association
Ultimate OCR
Ultimate Towner
Ultimate Warrior
Ultimate Warrior Challenge
Ultimate Zelie Challenge
UltiMutt Race
Ultm8 Warrior
Ultra Active 365
Umpqua Community College
UniSport Challenge
Up Down N Dirty
Urban Attack
US Canine Biathlon
USAOCR
USMC Ultimate Challenge Mud Run
Uventure Run
Valhalla Challenge
Vampire 5K
Vanguard Race
Viking Obstacle Race
Vino and the Beasts
Viper Challenge
Vogue Mud Run
W Hicks Obstacle Course Run
Wabash Valley Prison Break
Wadena Zombie Run
Wairua Warrior
Walk Run Fly
Walltown Warrior
Walter N Levy Challenge
War Horse Warrior Challenge
War-X
Warrior Adrenaline Race
Warrior Assault
Warrior Dash
Warrior Endurance
Warrior Race
Warrior Run
Warrior Swamp
Warriors Challenge
Wason Pond Pounder
Waves Mud and Mountains
Wessels Living History
West Mountain Countryman Challenge
Wheat City Fun Run
Whoos Gettin Dirty
Wichita Gladiator Dash
Wild Boar Challenge
Wild Miles
WILDR Rough Runner
Wilson Swamp Stomp
Winter Run or Obstalce Course
Winter Warrior Finland
Winterhell
Wolf Run
Wolf Run Caldwell
WOO WHO Urbanobstacle
Woodland Zombie Run
WYLD Mud Run
X Warrior Challenge
X-Dog Events
XLETIX Challenge
XMAN Race
XRACE
XRunner
YDSP
YMCA Marquette
YMCA Mud Run 4 Kids
YMCA Rat Race
YMCA WNC Dirty Dozen
Yorkshire Family Zombie Run
Yorkshire Warrior
Your First Mud Run
Yuma Fun Runs
YVCHR Tuff Enuf
Zach Attack
Zedtown Zombie Invasion
Zeus Races
Zombie Blood Run
Zombie Charge
Zombie Evacuation Race
Zombie Fun Run
Zombie Inflatable Obstacle Survival Run
Zombie Mud Run
Zombie Mud Run Canada
Zombie Puerto Rico
Zombie Run
Zombie Run Belgium
Zombie Run Gainesville
Zombie Run Running Scared
Zombie Survival Experience
Zombie Survival Run
Zulu Challenge
Red Dirt Mud Run
Redrun
Relish Running Races
Renegade Obstacle Race
Renegade Rage
Renegade Run
Republic Mud Run
Reviver Challenge
Rise Challenge Events
Rise Up Challenge
Robo Mud Run
ROC Argentina
Rock of Hell
Rocket Race
Rockfish Adventure Run
Rockin the Desert
Rodneys Off Road Challenge
Rogue Alpha Rush
Rood Rampage
Rough Events
Rough N Tough Mudder
Rough Runner
Royal Marines Commando Challenge
Royal Mud Man
Rubicon Race
Ruff Dugger
Ruff Mudder
Ruff Rampage
Ruff Run
Ruffin Mudder
Rugged Maniac
Rugged Ranch Run
Rugged Runner Challenge
Run Amuck
Run Dirty BahamaHealth Mud Run
Run Down The Demons
Run For Our Lives
Run for your Freakn Life
Run Lizard Creek
Run Mucker Run
Run of the Dead
Run Rampage
Run Steeplechase
Run the Gauntlet
Run the Hook
Run the Jailbreak
Run the Rails
Run The Ridge
Run the Rock
Run Wild Chile
Runamuck Challenge
Runmageddon
Running Dead KC
Running Warriors
Running Wild Race
RunZilla
RV Devil Dash
RX1 Nation
Samson Challenge
Samurai Sprint Mud Run
Sand and Misery Challenge
Savage Adventure Race
Savage Dash
Savage Race
SBSD Mud Run
Seabee Volkslauf Mud Run
Seamark Mudder
September Scramble
Shadeys Rugged Run
Shadow Ranch
Shark Life OCR
Shasta Mud Run
Shropshire Mud Run
SISU Endurance
Sisu Grit
Skibbereen Down and Dirty Adventure Challenge
SLO Ultra
Slop Hop
SMA Trust Mud Run
Soldier Dash
Soldier Rush
Soul Crusher
Sound View Camp Mud Run
South West Mudfest
Sparta Mud Run
Spartan Race
Special Operators Challenge
Sperunking Sandmine Challenge
Splat Jr Mud Run
Splat Quack GO
Sport Tasman Marlborough Muddy Buddy
St Giles Hospice Mud Challenge
St Lukes Hospice Mud Run
St. Patrick Mud Run
Stadium Blitz
Stampede Adventure Run
Stars and Scars
Steel City Showdown
Sterling House Down and Dirty
Stony Lonesome Mud Run
Stop Drop and Mud
Storm the Beach
Storm The Castle
Strong Viking
Stronger Women Stronger World
Suck It Up Buttercup
Suffolk Whole Hog
Summit Survivor
Summit To Swamp Mud Run
Sundown Mountain
Sunriver March Mudness
Super Hero Obstacle Race
Super Human Challenge
Superhero Dash
Survival of the Fittest
Survival Race
Survival Race
Survival Run
Survivor Mud Run
Survivor Race
Survivor Race UK
Swain Swamp Stomp
Swamp and Stomp Mud Run
Swamp Battle OCR
Swamp Challenge
Swamp Stomp 4 Mile
Swampfoot 4 Mile
Swan Creek Mud Run
Sweeney Mud Run
Tackle the Tar
Tactical Titan
Talahi Adventure Dash
Tame The Terrain
TARUC Obstacle Course Race
Tater Dash
Taurus 200
TEAAM Mud Run for Autism
Teach First Wolf Run
Teen Missions Mud Run
Tehama Tough Mud Run
Telegram & Gazette Woo Challenge
Terrain Racing
Terrier Tough
Teton Valley Mudzilla
Texas Warrior Mudout
The 5K Foam Fest
The 5k Zombie Run
The AhMazing Race
The Battlegrounds
The Beast Run
The Charity Challenge
The Color Run
The Dirty Dash
The Dirty Leprechaun
The Dirty Monty
The Elements OCR
The Gauntlet Games
The Gauntlet Race
The General
The Great Escape
The Grind
The Grizzly and Cub Run
The Holt Bolt
The Ice Cream Race
The Inflatable Run
The Jungle NI
The Little Welly Goes Wild
The Lumberjack Race
The Muck Of Kells
The Mud Day
The Mudnificent Seven
The Nuts Challenge
The Original Mud Run
The Pack Games
The Pursuit Games
The Puzzle Dash
The Rec Trek
The Ridge Run
The Rocket Gauntlet
The Swanbourne Endeavour
The Titan Run
The Zombie Dash
Theos Obstacle 5K
Thomas College Dirty Dog Mud Run
THOR
Thunder Run
ThunderDash
Tiger Band Zombie Run
Tiger Escapade
Tippy Mud Run
Titan Macquarie Mud Run
Titans Challenge
Titans Race
TK Gator Grind
Tomahawk Tromp
Tonka Mud Run
Total Warrior
Tough Cookie Adventure Race
Tough Cookie Mud Run
Tough Enough
Tough Gator
Tough Guy
Tough Kid Challenge
Tough Mudder
Tough Race
Tough Viking
Toughest
Tower Hill Challenge
TPK Endurance
Transylvania Adventure Games
Trash Dash 5K
TRENCH Challenge
Tri Forces Mud Run
TRIAD
Tribal Challenge
Tribal Waters
Trojan Challenge
Trolljegerproven
True Grit
True North Tough
Tuff Muck Challenge
Tuff Scramblers
TugMudder Adventure Run
Tvrdak
Twisted Steel OCR
Tyndall AFB The Running Dead
Udderly Muddy Rugged Run
Uff Da Challenge
Uff Da Mud Run
Ultimate Fitness Run
Ultimate Ninja Athlete Association
Ultimate OCR
Ultimate Towner
Ultimate Warrior
Ultimate Warrior Challenge
Ultimate Zelie Challenge
UltiMutt Race
Ultm8 Warrior
Ultra Active 365
Umpqua Community College
UniSport Challenge
Up Down N Dirty
Urban Attack
US Canine Biathlon
USAOCR
USMC Ultimate Challenge Mud Run
Uventure Run
Valhalla Challenge
Vampire 5K
Vanguard Race
Viking Obstacle Race
Vino and the Beasts
Viper Challenge
Vogue Mud Run
W Hicks Obstacle Course Run
Wabash Valley Prison Break
Wadena Zombie Run
Wairua Warrior
Walk Run Fly
Walltown Warrior
Walter N Levy Challenge
War Horse Warrior Challenge
War-X
Warrior Adrenaline Race
Warrior Assault
Warrior Dash
Warrior Endurance
Warrior Race
Warrior Run
Warrior Swamp
Warriors Challenge
Wason Pond Pounder
Waves Mud and Mountains
Wessels Living History
West Mountain Countryman Challenge
Wheat City Fun Run
Whoos Gettin Dirty
Wichita Gladiator Dash
Wild Boar Challenge
Wild Miles
WILDR Rough Runner
Wilson Swamp Stomp
Winter Run or Obstalce Course
Winter Warrior Finland
Winterhell
Wolf Run
Wolf Run Caldwell
WOO WHO Urbanobstacle
Woodland Zombie Run
WYLD Mud Run
X Warrior Challenge
X-Dog Events
XLETIX Challenge
XMAN Race
XRACE
XRunner
YDSP
YMCA Marquette
YMCA Mud Run 4 Kids
YMCA Rat Race
YMCA WNC Dirty Dozen
Yorkshire Family Zombie Run
Yorkshire Warrior
Your First Mud Run
Yuma Fun Runs
YVCHR Tuff Enuf
Zach Attack
Zedtown Zombie Invasion
Zeus Races
Zombie Blood Run
Zombie Charge
Zombie Evacuation Race
Zombie Fun Run
Zombie Inflatable Obstacle Survival Run
Zombie Mud Run
Zombie Mud Run Canada
Zombie Puerto Rico
Zombie Run
Zombie Run Belgium
Zombie Run Gainesville
Zombie Run Running Scared
Zombie Survival Experience
Zombie Survival Run
Zulu Challenge
List of all InActive Race Series & Organizers of Mud Runs, Obstacle Races, and Adventure Runs
It appears these events are no longer being held, if you have any questions, please contact the event directly.
Click on any race series name to see full details about that race and their contact information
4 Seasons Challenge
4H Mud Run
4×4 Nuts
5K Adventure Run
5K Adventure Series
5K Foam Fest
5K Fun Mudder
5KRunDead Zombie Run
6K Military Run
7 Summits Adventure Race
9RUN1 Challenge
A Lil Crazy Run
ABF Mud Run
ACMHS Race for Recovery
Adare to Survive
Adrenalin Rush
Adrenaline Run
Adrenaline Rush
AFS Obstacle Challenge
Aftermath Survival Challenge
AGOGE Obstacle Course Race
Airfield Anarchy
Alabama Mountain Mudder
All Out Races
Almighty Mud Run
Alpha OCR Series
Alpha Warrior
Alvin Stampede Mud Run
American Gladiator Series
American Hotshots Extreme Run
American Mud Race
Amesbury Sports Park
Amphibirun
Anderock Challenge
Andy Alligators Swamp Stomp
Anthony Rotary Mud Run
Apex Extreme Run
Apple Dash
Are You Brave Enough
Arizona SwimRun
Armageddon Ambush
Army Lake Camp Mud Run
Artopios Mission Run
ASC Obstacle Dash
Ash Kicker
Atlas Race
Atlas Run
Audubon Mud Run
Autumn Daze Craze
Avalanche Run
AZ Mudathon
Back Country Mud Run
Back O Bourke Mud Run
Backwoods Beast
Bad Ass America
Baddest Mud Run
Banna Beast Challenge
Barn Yard Trot
BarraMuddy
Battle at The Brazos
Battle Challenge
Battle of Baton Rouge
Battle of Maestricht
Battle Of The Badges Mudrun
Battle of the Brave
Battle Run Obstacle Race
Battle the Beach
Battlefield Fitness
BattleFrog Series
Be Brave 24
Beach Bash Obstacle Challenge
Beach Beast
Beach Derby
Beach Warrior
Beast Mode Challenge
Beast of the East
Beat the Gauntlet
Behind Enemy Lines
Benjamin Dash
Berserker Challenge
Berserker Race League Tournament
Berserkr Games
Berzerker OCR
Beware of the Beast
Big Daddys Zombie Run Crawl
Big Earls Extreme Race
Big Head Endian 5K
Big Muddy Run
Bill Bottinos Mud Run for Cancer
Binder Lake Army Challenge
Black Bear Adventure Race
Black Hills Mud Run
Blackheart Challenge
Blenheim Zombie Run
Blood and Sweat Challenge
Blue Skies Adventure Race
BODCROSS
Bogstacle Mud Run
Boonie Gut Check
Boot Scootin Boogie
Bootneck Events
Boots on Ground
Bottega Fitness
Boulder Mud Race
BozeMonster Challenge
BPA Mud Run
Brains and Brawn Run
Brantford Police Auxiliary Mud Heroes
Brave Heart Warrior Challenge
Brave Soldier Challenge
Brazos Valley Warrior
Briarcliff BC Stampede
Broncos Stadium Challenge
BSR Cable Park Run
Buffalo Battle
Buffalo Zombie Mud Run
Building Bridges Mud Run
Bulldog Mudrun Challenge
Burden Dayz Challenge
Bushido Challenge
ByronFest Fitness Challenge
Cahoots Duo Challenge
Caldecotte Xtreme Challenge
Calebs Mountain Mud Run
Call of the Beast
Call of the Warrior
Cambridge Christmas Pudding Race
Camel Crawl Mud Run
Camp LePrat Mud Run
Camp Titan
Campathlon Racer
Capitol Apocalypse 5k Zombie Run
Capitol City River Dash
Carbon County Fair
Cashiers Trail Mix
Caustic Adrenaline Challenge
Caveman Crawl
Cedarville Jersey Mud Run
Centurion Mud Challenge
Cerebrun
Chaffee Challenge Mud Run
Challenge Smeekley
Challenge-X
Channels Challenge
Charlotte County BCC
Chase Race
Chasing Squirrels
Chattanooga Mud Run
ChickFilA Family Mud Run
China Peak Mud Run
Cincy Nation Mud Run
Ciudaton
Civil Ties
Civilian Military Combine
Clackamas Cougar Run
Clarke County Iron Track Challenge
Clash Of The Warriors PR
CLC Mud Run
Clinton Classic
Collins Home Mud Run
Color Games
Colorado Green Beret Challenge
Commander Run
Commando Challenge
Concrete Rush
Connie Maxwell Mud Run
Conquer the Fort
Conquest Mud Run
Coon Rapids Dirty Bird
Cooper Challenge
Copper Medallion Oktoberfest Race
Core Fitness Dirty Dash
Corn Fed Crucible
Cornish Cider Run
Cornish Santa Run
Corpse Crawl
Courage Challenge
Cowboy 5K
Cowboy Mud Run
Cowboy Mud Run Georgia
Coyote Games Outdoor Challenge
Critical Mud
Cross Country Chaos
CrosSport Warrior Challenge
Culpeppers Rebellion
Custers Challenge
Dash of the Titan
Dash of the Titans
Day of Crisis
Dead 4 Life
Dead White and Chew
Deerslayer
Delivery Land
Demon Run
Devil Dash
Devils Dash
Dhillbillies Mud Run
Diamond Hill Challenge
Diamond Surf n Turf
Dirty 30
Dirty 30 Family Mud Run
Dirty and Proud
Dirty Cause Challenge
Dirty Creek Mud Run
Dirty Dan Dash
Dirty Dog Mud Run
Dirty Doyle
Dirty Dozen
Dirty Foot Mud Run
Dirty Girl Mud Run
Dirty Paws
Dirty South Mud Run
DirtyBird Mud Run
Disaster Blaster
Disaster Run
Distress The Dress
Diva Dash
Dog Waller
Domus NINER
Doomsday Dash
Doors Dirty 5K
Down and Dirty Obstacle Race
Down and Dirty Stampede
Down N Dirty Mud Run
Dubai Gladiators Challenge
DucknDodge
Eagles Nest
Easter Mud Hunt
Eat Dirt Mud Run
Eau Claire Mud Jam
edMUDton
Eggcellent Obstacle Race
Eglin Air Force Base
Eirias Extreme
Elbert Mud Run
Endurer Dash
Energy Fitness
Enforcer Challenge
Epic Fail Challenge
Epic Grind
Epic Mud Run
EpinephRun
Escape Obstacle Run
Escape Races
Escape the Chase
Escape The Nightmares
Escape The Walkers
Escape the Yak
Extreme Cold Run
Extreme Events
Extreme Field Day
Extreme Mountain Mud Race
Extreme Mud Run
Extreme Nation
Extreme Rampage
Extreme Swamp Romp
Eye Mud Run
Eyrecourt Mud Run
Face Your Fears
Fallen Warrior Challenge
Families On Challenge
Family Farm Obstacle Series
Family Promise Mountain Mud Run
Farm Fit
Farm Fun Mud Run
Farm Mud Run
Fear the Pier
Fernbrook Farms Farm Run
Filthy Fun Mud Run
Filthy Fun Run
Filthy Girl
Filthy Soles
Fire Run
Firebreather Challenge
Firerace
Firetower Run-A-Muck
Fitathlon Challenge
Fittpalooza
FLX Events
Flying Dirty Mud Run
Force of Nature
Forge Through Hell
Fort Tough
Fort Wayne Zombie Mud Run
Freefall X-Race
Fugitive Run
Fury at the Fairgrounds
Fustercluck
Gardens and Ghouls
Garibaldi Mud Run
Gasconade Gauntlet
Gator Tuf Mud Run
GC Gauntlet Obstacle
Gem City Gauntlet
Get Mucked
Get Newked
Gettin Muddy For Kids
GI Dash Undead
Gladiator Girl Run
Gladiator Training Grounds
Go Ballistic
GoGirl Mud Run
GoHard Obstacle Run
Goliath Challenge
Goliath Mud Challenge
Goose Poop Challenge
Got Mud
GR8 Escape Mud Run
Grave Digger Race
Great American Mud Run
Great Muddy Endurance Races
Great Pumpkin Dash
GreenZone Heroes
Grinder Obstacle Course Challenge
Grit Events
Grit Fit
Grizzly Football Mud Run
Ground Zero Survival Run
Grumpy Muddah
GSM Gruelling Games
Gut Check Challenge
Guts and Glory Quarry Challenge
Halloween Park
Hard as Nails
Hard Charge
Hardcore Caribbean
Hartselle Zombie Chase
4H Mud Run
4×4 Nuts
5K Adventure Run
5K Adventure Series
5K Foam Fest
5K Fun Mudder
5KRunDead Zombie Run
6K Military Run
7 Summits Adventure Race
9RUN1 Challenge
A Lil Crazy Run
ABF Mud Run
ACMHS Race for Recovery
Adare to Survive
Adrenalin Rush
Adrenaline Run
Adrenaline Rush
AFS Obstacle Challenge
Aftermath Survival Challenge
AGOGE Obstacle Course Race
Airfield Anarchy
Alabama Mountain Mudder
All Out Races
Almighty Mud Run
Alpha OCR Series
Alpha Warrior
Alvin Stampede Mud Run
American Gladiator Series
American Hotshots Extreme Run
American Mud Race
Amesbury Sports Park
Amphibirun
Anderock Challenge
Andy Alligators Swamp Stomp
Anthony Rotary Mud Run
Apex Extreme Run
Apple Dash
Are You Brave Enough
Arizona SwimRun
Armageddon Ambush
Army Lake Camp Mud Run
Artopios Mission Run
ASC Obstacle Dash
Ash Kicker
Atlas Race
Atlas Run
Audubon Mud Run
Autumn Daze Craze
Avalanche Run
AZ Mudathon
Back Country Mud Run
Back O Bourke Mud Run
Backwoods Beast
Bad Ass America
Baddest Mud Run
Banna Beast Challenge
Barn Yard Trot
BarraMuddy
Battle at The Brazos
Battle Challenge
Battle of Baton Rouge
Battle of Maestricht
Battle Of The Badges Mudrun
Battle of the Brave
Battle Run Obstacle Race
Battle the Beach
Battlefield Fitness
BattleFrog Series
Be Brave 24
Beach Bash Obstacle Challenge
Beach Beast
Beach Derby
Beach Warrior
Beast Mode Challenge
Beast of the East
Beat the Gauntlet
Behind Enemy Lines
Benjamin Dash
Berserker Challenge
Berserker Race League Tournament
Berserkr Games
Berzerker OCR
Beware of the Beast
Big Daddys Zombie Run Crawl
Big Earls Extreme Race
Big Head Endian 5K
Big Muddy Run
Bill Bottinos Mud Run for Cancer
Binder Lake Army Challenge
Black Bear Adventure Race
Black Hills Mud Run
Blackheart Challenge
Blenheim Zombie Run
Blood and Sweat Challenge
Blue Skies Adventure Race
BODCROSS
Bogstacle Mud Run
Boonie Gut Check
Boot Scootin Boogie
Bootneck Events
Boots on Ground
Bottega Fitness
Boulder Mud Race
BozeMonster Challenge
BPA Mud Run
Brains and Brawn Run
Brantford Police Auxiliary Mud Heroes
Brave Heart Warrior Challenge
Brave Soldier Challenge
Brazos Valley Warrior
Briarcliff BC Stampede
Broncos Stadium Challenge
BSR Cable Park Run
Buffalo Battle
Buffalo Zombie Mud Run
Building Bridges Mud Run
Bulldog Mudrun Challenge
Burden Dayz Challenge
Bushido Challenge
ByronFest Fitness Challenge
Cahoots Duo Challenge
Caldecotte Xtreme Challenge
Calebs Mountain Mud Run
Call of the Beast
Call of the Warrior
Cambridge Christmas Pudding Race
Camel Crawl Mud Run
Camp LePrat Mud Run
Camp Titan
Campathlon Racer
Capitol Apocalypse 5k Zombie Run
Capitol City River Dash
Carbon County Fair
Cashiers Trail Mix
Caustic Adrenaline Challenge
Caveman Crawl
Cedarville Jersey Mud Run
Centurion Mud Challenge
Cerebrun
Chaffee Challenge Mud Run
Challenge Smeekley
Challenge-X
Channels Challenge
Charlotte County BCC
Chase Race
Chasing Squirrels
Chattanooga Mud Run
ChickFilA Family Mud Run
China Peak Mud Run
Cincy Nation Mud Run
Ciudaton
Civil Ties
Civilian Military Combine
Clackamas Cougar Run
Clarke County Iron Track Challenge
Clash Of The Warriors PR
CLC Mud Run
Clinton Classic
Collins Home Mud Run
Color Games
Colorado Green Beret Challenge
Commander Run
Commando Challenge
Concrete Rush
Connie Maxwell Mud Run
Conquer the Fort
Conquest Mud Run
Coon Rapids Dirty Bird
Cooper Challenge
Copper Medallion Oktoberfest Race
Core Fitness Dirty Dash
Corn Fed Crucible
Cornish Cider Run
Cornish Santa Run
Corpse Crawl
Courage Challenge
Cowboy 5K
Cowboy Mud Run
Cowboy Mud Run Georgia
Coyote Games Outdoor Challenge
Critical Mud
Cross Country Chaos
CrosSport Warrior Challenge
Culpeppers Rebellion
Custers Challenge
Dash of the Titan
Dash of the Titans
Day of Crisis
Dead 4 Life
Dead White and Chew
Deerslayer
Delivery Land
Demon Run
Devil Dash
Devils Dash
Dhillbillies Mud Run
Diamond Hill Challenge
Diamond Surf n Turf
Dirty 30
Dirty 30 Family Mud Run
Dirty and Proud
Dirty Cause Challenge
Dirty Creek Mud Run
Dirty Dan Dash
Dirty Dog Mud Run
Dirty Doyle
Dirty Dozen
Dirty Foot Mud Run
Dirty Girl Mud Run
Dirty Paws
Dirty South Mud Run
DirtyBird Mud Run
Disaster Blaster
Disaster Run
Distress The Dress
Diva Dash
Dog Waller
Domus NINER
Doomsday Dash
Doors Dirty 5K
Down and Dirty Obstacle Race
Down and Dirty Stampede
Down N Dirty Mud Run
Dubai Gladiators Challenge
DucknDodge
Eagles Nest
Easter Mud Hunt
Eat Dirt Mud Run
Eau Claire Mud Jam
edMUDton
Eggcellent Obstacle Race
Eglin Air Force Base
Eirias Extreme
Elbert Mud Run
Endurer Dash
Energy Fitness
Enforcer Challenge
Epic Fail Challenge
Epic Grind
Epic Mud Run
EpinephRun
Escape Obstacle Run
Escape Races
Escape the Chase
Escape The Nightmares
Escape The Walkers
Escape the Yak
Extreme Cold Run
Extreme Events
Extreme Field Day
Extreme Mountain Mud Race
Extreme Mud Run
Extreme Nation
Extreme Rampage
Extreme Swamp Romp
Eye Mud Run
Eyrecourt Mud Run
Face Your Fears
Fallen Warrior Challenge
Families On Challenge
Family Farm Obstacle Series
Family Promise Mountain Mud Run
Farm Fit
Farm Fun Mud Run
Farm Mud Run
Fear the Pier
Fernbrook Farms Farm Run
Filthy Fun Mud Run
Filthy Fun Run
Filthy Girl
Filthy Soles
Fire Run
Firebreather Challenge
Firerace
Firetower Run-A-Muck
Fitathlon Challenge
Fittpalooza
FLX Events
Flying Dirty Mud Run
Force of Nature
Forge Through Hell
Fort Tough
Fort Wayne Zombie Mud Run
Freefall X-Race
Fugitive Run
Fury at the Fairgrounds
Fustercluck
Gardens and Ghouls
Garibaldi Mud Run
Gasconade Gauntlet
Gator Tuf Mud Run
GC Gauntlet Obstacle
Gem City Gauntlet
Get Mucked
Get Newked
Gettin Muddy For Kids
GI Dash Undead
Gladiator Girl Run
Gladiator Training Grounds
Go Ballistic
GoGirl Mud Run
GoHard Obstacle Run
Goliath Challenge
Goliath Mud Challenge
Goose Poop Challenge
Got Mud
GR8 Escape Mud Run
Grave Digger Race
Great American Mud Run
Great Muddy Endurance Races
Great Pumpkin Dash
GreenZone Heroes
Grinder Obstacle Course Challenge
Grit Events
Grit Fit
Grizzly Football Mud Run
Ground Zero Survival Run
Grumpy Muddah
GSM Gruelling Games
Gut Check Challenge
Guts and Glory Quarry Challenge
Halloween Park
Hard as Nails
Hard Charge
Hardcore Caribbean
Hartselle Zombie Chase
Haymaker 5000
Heavy HIITers
Hell Run
Hells Hollow Mudd Run
Hells Run
Hercoilean
Hero Mud Challenge
Hero Races
Hero Rush
Heroes and Villains Adventure Run
Heroes Battlefield
Heroes for Hope
Heroes Mud Run WA
Heroes Obstacle Race
Heroes vs Villains Flag Gauntlet
Hidden Creek Park Mud Run
Hidden Warrior
High Country Goliath
Highbridge Hills
Highland Lakes Camp
Highland Mud Run
Hillbilly 5K
Hit and Run 5K
Hodges Family Farm Run
Holy Moly Mud Run
Honfleur Challenge
Hoof Stomp Mud Run
HookaMuck Challenge
Horahora Hard Core Mud Run
Horton Lake Outbreak
Hot an Dirty Mud Run
Hottest Habanero Hustle
Hullabaloo Family
Humans V Zombies Adventure Race
Humboldt County Mudrun
Hunted OCR
Hunter Games
Hurricane Mud Flud Run
Ice Warrior Challenge
Ikaika Nui Extreme Obstacle Challenge
In Your Face 5K
Indee Zombie Run
indoc Elite Warrior Challenge
Insanity Run
Into the Mud Challenge
Ioala Zombie 5K Run
Iowa Games Mud Run
Ireland Run For Your Lives
Iron Knight
Iron Warrior Dash
Iron Will Warrior Challenge
Italian Mud Run Experience
Its a Knockout
Jack Axe Games
Jacksonville Mud Obstacle Challenge
Jailbreak Brevard
JungleGym
Jurassic Classic Mud Run
Kendallville Warrior Run
Kern Dash
Kickass Obstacle Race
Kids Sloppy Sprint
KidsPeace
KidsUathlon
King Muck
Kiss Me Dirty
Knights Quest Medieval Mud Run
Kodex Race
KY Foam Run
KY Zombie Mud Run
La Conquete
Lago Mad Dash
Lake Eerie Zombie Mud Run
Lake Fear
Lake Villa Chamber Mud Run
Land Runners
Last2Survive
Le Defi des Coursoeufs
Legends BattleCry
Leyton Warrior Challenge
Live Well Magnolia
LiveFitCt Mud Run
Loch Mountain Challenge
Long Island Adventure
Lords of the Mud
Lost Tribe Expeditions
Louisiana Mud Dash
Love Mud Run
LoziLu
Mach One Mud Run
Macon Mud Run
Mad Dash
Mad Mud Run
Madtown Mudrun
Magic City Mudder
Major Series
Man Challenge Denver
Man Down Event
Man Games
MAN vs MUD
Mango Hill Mud Run
Mankato Mud Run
Mankato Zombie Run
Marauder Run
March Madness Nicaragua
March MUDness
Margate Dune Dash
Marmion Heroes Mud Run
Marquette Mountain Mud
Marvel Events
Mass Mayhem
Mavericks Mud Run
Max Tracks
McMurtry Mudder
McTough Guy
Mean Streets
Medieval Mud
Melbourne Mud Bash
Men’s Health Urbanathalon
Mendon Zombie Run
Mestival Hesleyside
Met Con Blue
Michigan Dirty Bird Mud Run
Michigan Zombie Run
Midwest Mud Rush
Miles of Mud
Milles Flocons
Milton Mud Challenge
Ministry Mud Summit
Miserable Miles
Miss Muddy
MOJO Challenge
Monroe Mud Madness
Monster Challenges
Monster Dash
Monster Dash SC
Monster Mudster Run
Monster Race
Montessori Mudstacle
Montpelier Mud Run
Moore County Zombie Run
MORE
Morning Glory Ranch
Mosquito Dash
Mountain Mucker
Mountain Tuff Mudd Run
Mountaineer Mud Run
MS Mud Dash
Muck Run
Mud and Bud Run
Mud and Mucker Challenge
Mud and Music Mayhem
Mud and Sweat
Mud Brigade
Mud Challenger
Mud Chasers
Mud Crazy
Mud Crusade
Mud Dog Challenge
Mud Dogs
Mud Duck Mudder
Mud Fears Me
Mud Fusion
Mud Gladiators
Mud Guts and Glory
Mud Heights
Mud Madness Run
Mud Mania
Mud Mash
Mud Match
Mud Mingle
Mud Mountain Rock and Run
Mud Mulisha
Mud N Color
Mud N Fun Viking Run
Mud n Madness
Mud O Ween
Mud Quest
Mud Run Emerald
Mud Run In The Sun
Mud Run Krusher
Mud Rush
Mud Sux Run
Mud Sweat and Beers
Mud Sweat and Boobs
Mud Sweat and Fear
Mud Trax Run
Mud U
Mud Up Day
Mud With Landon
Mudathlon
MudCross Challenge
Mudd Monsters
Mudder of all Runs
Mudderella
Mudders Against Domestic Violence
Mudders Day Run
Muddin 4 Life
Muddin for a Cause
Muddy Addiction
Muddy and Messy
Muddy Brute Challenge
Muddy Buddy
Muddy Cheer Challenge
Muddy Fanatic
Muddy Madness
Muddy Mama
Muddy Maniacs
Muddy Mates
Muddy Mortal
Muddy Mucker
Muddy Rhino Run
Muddy Trail Run
Muddy Udder Pasture Run
Muddy Vike
Muddy Warrior Run
MudHeights
MudMan
MudManX
Mudocalypse
MudRun Fun
Mudsanity
MudSlam
MudSlayers
Mudtastik Mud Run
MudVenture
Muscle Up Obstacle Run
National Prep Race
NCTC Mud Run
Neptunus Run
Newquay Mudathon
Next Level Mud Run
Niagara Obstacle Race
Night Attack
Night Games
Nightmare Run
Ninja Mud Run
NorCal Mud Run
Norfolk Fire Department
Novi Obstacle Challenge
O Course
Obsmonge
Obstacle Advantage Race
Obstacle Adventures
Obstacle Apocalypse
Obstacle Course Extravaganza
Obstacle Craze
Obstacle Elite
Obstacle World
Obstacles With A Purpose
Obstacles Wont Stop Us
OC Bootcamp Games
OCC Obstacle Challenge Course
OCRA UK Championships
OCRLiveFit
OCs Fittest Trainer
OffTerrain Movement and Agility
Oh Muck
Ohio Valley Mud Run
Ohio Zombie Run
Oklahoma Run the Ranch
One King Mud Run
One Tough Cookie
One Wicked Run
Ooh Rah Dash
Operation Pathfinder Challenge
Operation Tall Timber
Orlando Fire Run
Outbreak 5K
OutFit Challenge
Overcomer Challenge
Pain Barrier
Pain Is But A Moment In Time
Pangea Adventure Racing
Panther Mud Grudge
Parent and Me Obstacle Challenge
Park Ratheniska GAA
Patriot Challenge
Payne Games
Pelham Mudfest Challenge
Phi Eta Mud
Pirate Muddy Run
Pirate Plunder Adventure Race
Play Dirty Adventure
Port Macquarie Sand Mudder
PowerUP OCR
PPRD Mini Mudder
Praetorian Race
Pretty Muddy
Primal Challenge
Primal Games
Primal Mud Run
Primal Rush
Project Mud
Proving Grounds
Pumpkin Smash
Quinte Zombie Zone
R3Ops
Race for Grace Obstacle Challenge
Race for the ROC
Race the Reaper
Race Your Neighbor
Radford Mission Impossible
Radical Run
RAID Series
Raider Rampage
Rails To Entrails
Rally At Three Valley
Rampage at the Ridge
Rathcormac Mud Challenge
Rebel Race
Rebound Race
Red White and Blue
Red White and BOOM
Redneck Romp Adventure Race
Redneck Run
Reeses Obstacle Race Series
Reigate Rampage Run
Reign of Terror
Renegade Playground Challenge
Respond Ultimate Mud Challenge
Reverse the Cycle
Revival Run
Revolution Runs
REVRUN
RhinO Course
Heavy HIITers
Hell Run
Hells Hollow Mudd Run
Hells Run
Hercoilean
Hero Mud Challenge
Hero Races
Hero Rush
Heroes and Villains Adventure Run
Heroes Battlefield
Heroes for Hope
Heroes Mud Run WA
Heroes Obstacle Race
Heroes vs Villains Flag Gauntlet
Hidden Creek Park Mud Run
Hidden Warrior
High Country Goliath
Highbridge Hills
Highland Lakes Camp
Highland Mud Run
Hillbilly 5K
Hit and Run 5K
Hodges Family Farm Run
Holy Moly Mud Run
Honfleur Challenge
Hoof Stomp Mud Run
HookaMuck Challenge
Horahora Hard Core Mud Run
Horton Lake Outbreak
Hot an Dirty Mud Run
Hottest Habanero Hustle
Hullabaloo Family
Humans V Zombies Adventure Race
Humboldt County Mudrun
Hunted OCR
Hunter Games
Hurricane Mud Flud Run
Ice Warrior Challenge
Ikaika Nui Extreme Obstacle Challenge
In Your Face 5K
Indee Zombie Run
indoc Elite Warrior Challenge
Insanity Run
Into the Mud Challenge
Ioala Zombie 5K Run
Iowa Games Mud Run
Ireland Run For Your Lives
Iron Knight
Iron Warrior Dash
Iron Will Warrior Challenge
Italian Mud Run Experience
Its a Knockout
Jack Axe Games
Jacksonville Mud Obstacle Challenge
Jailbreak Brevard
JungleGym
Jurassic Classic Mud Run
Kendallville Warrior Run
Kern Dash
Kickass Obstacle Race
Kids Sloppy Sprint
KidsPeace
KidsUathlon
King Muck
Kiss Me Dirty
Knights Quest Medieval Mud Run
Kodex Race
KY Foam Run
KY Zombie Mud Run
La Conquete
Lago Mad Dash
Lake Eerie Zombie Mud Run
Lake Fear
Lake Villa Chamber Mud Run
Land Runners
Last2Survive
Le Defi des Coursoeufs
Legends BattleCry
Leyton Warrior Challenge
Live Well Magnolia
LiveFitCt Mud Run
Loch Mountain Challenge
Long Island Adventure
Lords of the Mud
Lost Tribe Expeditions
Louisiana Mud Dash
Love Mud Run
LoziLu
Mach One Mud Run
Macon Mud Run
Mad Dash
Mad Mud Run
Madtown Mudrun
Magic City Mudder
Major Series
Man Challenge Denver
Man Down Event
Man Games
MAN vs MUD
Mango Hill Mud Run
Mankato Mud Run
Mankato Zombie Run
Marauder Run
March Madness Nicaragua
March MUDness
Margate Dune Dash
Marmion Heroes Mud Run
Marquette Mountain Mud
Marvel Events
Mass Mayhem
Mavericks Mud Run
Max Tracks
McMurtry Mudder
McTough Guy
Mean Streets
Medieval Mud
Melbourne Mud Bash
Men’s Health Urbanathalon
Mendon Zombie Run
Mestival Hesleyside
Met Con Blue
Michigan Dirty Bird Mud Run
Michigan Zombie Run
Midwest Mud Rush
Miles of Mud
Milles Flocons
Milton Mud Challenge
Ministry Mud Summit
Miserable Miles
Miss Muddy
MOJO Challenge
Monroe Mud Madness
Monster Challenges
Monster Dash
Monster Dash SC
Monster Mudster Run
Monster Race
Montessori Mudstacle
Montpelier Mud Run
Moore County Zombie Run
MORE
Morning Glory Ranch
Mosquito Dash
Mountain Mucker
Mountain Tuff Mudd Run
Mountaineer Mud Run
MS Mud Dash
Muck Run
Mud and Bud Run
Mud and Mucker Challenge
Mud and Music Mayhem
Mud and Sweat
Mud Brigade
Mud Challenger
Mud Chasers
Mud Crazy
Mud Crusade
Mud Dog Challenge
Mud Dogs
Mud Duck Mudder
Mud Fears Me
Mud Fusion
Mud Gladiators
Mud Guts and Glory
Mud Heights
Mud Madness Run
Mud Mania
Mud Mash
Mud Match
Mud Mingle
Mud Mountain Rock and Run
Mud Mulisha
Mud N Color
Mud N Fun Viking Run
Mud n Madness
Mud O Ween
Mud Quest
Mud Run Emerald
Mud Run In The Sun
Mud Run Krusher
Mud Rush
Mud Sux Run
Mud Sweat and Beers
Mud Sweat and Boobs
Mud Sweat and Fear
Mud Trax Run
Mud U
Mud Up Day
Mud With Landon
Mudathlon
MudCross Challenge
Mudd Monsters
Mudder of all Runs
Mudderella
Mudders Against Domestic Violence
Mudders Day Run
Muddin 4 Life
Muddin for a Cause
Muddy Addiction
Muddy and Messy
Muddy Brute Challenge
Muddy Buddy
Muddy Cheer Challenge
Muddy Fanatic
Muddy Madness
Muddy Mama
Muddy Maniacs
Muddy Mates
Muddy Mortal
Muddy Mucker
Muddy Rhino Run
Muddy Trail Run
Muddy Udder Pasture Run
Muddy Vike
Muddy Warrior Run
MudHeights
MudMan
MudManX
Mudocalypse
MudRun Fun
Mudsanity
MudSlam
MudSlayers
Mudtastik Mud Run
MudVenture
Muscle Up Obstacle Run
National Prep Race
NCTC Mud Run
Neptunus Run
Newquay Mudathon
Next Level Mud Run
Niagara Obstacle Race
Night Attack
Night Games
Nightmare Run
Ninja Mud Run
NorCal Mud Run
Norfolk Fire Department
Novi Obstacle Challenge
O Course
Obsmonge
Obstacle Advantage Race
Obstacle Adventures
Obstacle Apocalypse
Obstacle Course Extravaganza
Obstacle Craze
Obstacle Elite
Obstacle World
Obstacles With A Purpose
Obstacles Wont Stop Us
OC Bootcamp Games
OCC Obstacle Challenge Course
OCRA UK Championships
OCRLiveFit
OCs Fittest Trainer
OffTerrain Movement and Agility
Oh Muck
Ohio Valley Mud Run
Ohio Zombie Run
Oklahoma Run the Ranch
One King Mud Run
One Tough Cookie
One Wicked Run
Ooh Rah Dash
Operation Pathfinder Challenge
Operation Tall Timber
Orlando Fire Run
Outbreak 5K
OutFit Challenge
Overcomer Challenge
Pain Barrier
Pain Is But A Moment In Time
Pangea Adventure Racing
Panther Mud Grudge
Parent and Me Obstacle Challenge
Park Ratheniska GAA
Patriot Challenge
Payne Games
Pelham Mudfest Challenge
Phi Eta Mud
Pirate Muddy Run
Pirate Plunder Adventure Race
Play Dirty Adventure
Port Macquarie Sand Mudder
PowerUP OCR
PPRD Mini Mudder
Praetorian Race
Pretty Muddy
Primal Challenge
Primal Games
Primal Mud Run
Primal Rush
Project Mud
Proving Grounds
Pumpkin Smash
Quinte Zombie Zone
R3Ops
Race for Grace Obstacle Challenge
Race for the ROC
Race the Reaper
Race Your Neighbor
Radford Mission Impossible
Radical Run
RAID Series
Raider Rampage
Rails To Entrails
Rally At Three Valley
Rampage at the Ridge
Rathcormac Mud Challenge
Rebel Race
Rebound Race
Red White and Blue
Red White and BOOM
Redneck Romp Adventure Race
Redneck Run
Reeses Obstacle Race Series
Reigate Rampage Run
Reign of Terror
Renegade Playground Challenge
Respond Ultimate Mud Challenge
Reverse the Cycle
Revival Run
Revolution Runs
REVRUN
RhinO Course
Rhino Gladiator
Rib Race
Ridiculous Obstacle Challenge
Rise of the Ronin
River Warrior Mud Run
Roanoke Zombie Run
Robin Run
Rock in the Mud Challenge
Rock On Adventures
Rock Running Obstacle Race
Rock Solid Mud Run
Rock Solid Race
Rockabilly Riot Urban Challenge
Rocklin Ramble
RockMan Challenge
Rogue Runner
Romp at Riddle Point
Romp in the Swamp
Roots in the Mud
Rough and Tumble
Rough Kidder
Roughneck Mud Run
Roughneck Stampede
Rowdy Run
Ruckus Obstacle Race Series
Rumble Run
Run A Muck
Run and Gun
Run and Gun Race
Run For A Cure Mud Run
Run For The Hills
Run For The Hills Mud Run
Run For The King
Run For Your Lives
Run It Like Its Hot
Run of the Living Dead
Run or Die
Run The Ranch
Run the ZA
Run To Death
Run Zombie Run
RUNdezvous Race
RunFearless
Running Dead
Running Dead 5K
Running Dirty
Running Scared
Running with the Cows
Russell County Search and Rescue
Russian River Mud Run
Sacramento Survivor Challenge
Sacramento Zombie Run
Safety Forces Endurance Challenge
Sam Michael Obstacle Course Race
Sandia OCR Mud Run
Sandman
Santa Mud Run
Santas Obstacle Challenge
Scattered and Battered
Scavenger Dash
Scotland County Survival Run
SCOUT Strong Mud Run
SEAL Trek
Shale Hill Adventure
Slippery Saints Mud Run
Smorgasbord Race
Snake Hill Slam
Soar Above The Challenge
South Walton
Southern Classic Terrain Mud Run
Space Coast Mud Run
Sparta Events
Spartan Zombie Run
Special Ops Race
Special Ops Series
Special Z Games
Speedway Series
Splat Mud Run
Sports Hangout
Spring Daze Craze
Spring Fling Obstacle Run
Springfield Urban Warrior Challenge
Spud Mud Run
Squaw Creek Army Challenge
Sqwish Sqwash
SSC City Challenge
St. Clair Scramble
Steamboat Mad Mud Run
Steelathlon
Steeplechase Challenge
Step Up For Soldiers
Stoneman Race
Storm the Fort
Strength & Speed’s OCR America
Stronghold Challenge
Stunt Challenge
Summer Daze Craze
Summer Muddin
Super Hero for SAFE
Superhero Scramble
Survival Beach
Survival Sprint
Survive the Climb
Survive the Farm
Survivorgame
Swamp Buggy Mud Blast
Swamp Dash and Bash
Swamp Romp
Swamp Stomp Mud Run
Tac Force Challenge
Tactical Elite Warrior Challenge
Talise Sandstorm
Tampa Mud Race
Tandem Race
Taskforce Live
Team Vs Terrain
Terrapin Adventues
That Dam Mud Run
The Almighty
The Battle Run
The Beast Challenge
The Blitz
The Bravest
The Bull Challenge
The Burner
The Challenge Mud Run
The Color Course
The DAM Mud Run
The Dirty Farm Run
The Dirty Rotten Scramble
The Eliminator
The Endurance Games
The Farmers Mile
The Few The Proud The Muddy
The Freeze
The Gauntlet
The Gladiator Mud Run
The Great Escape MudRun
The Great Escape Savannah
The Great Gauntlet
The Heroes Mud Run
The Hope Challenge
The Inferno
The Liquid Run
The Mad Run
The Mighty Run
The Mud Games
The Mud Run
The MudBug Run
The Muddy Mountain
The Muddy Patriot
The Parent Trap
The Real McCoy
The Renaissance Run
The Rite
The Rugged Run
The Rush Games
The Sand Pit
The Scorpion Run
The Siege Race
The Slime Run
The Stampede
The Stampede Australia
The Suffering Series
The Trident Race
The Twilight Run
The Ultimate Titan Challenge
The Urban Jungle
The Urban Trials
The Victory Challenge
The Viking Challenge
The Walking Dead Escape
The Wild Stampede
The X Run
The Young and the Restless
The Zombie Mudder
The Zombie Run
Thin Mint Sprint
ThrillSeeker 5K Stunt Run
Thunder Challenge
Tippecanoe Trail and Mud Run
Tipperary Mud Run
Titan Challenge
Titan MOB
Titan5 Challenge
TNMRA
Top Ninjas
Torture Trails
Total Life Fitness Challenge
Tough Bloke Challenge
Tough Dash
Tough Knight
Tough N Dirty
Tough Sht
Tough X Rough
Trail Toad Battle Run
Trailtroopers
Transylvania K9 Challenge
Tribal Extreme Mud Run
Tribal Quest
Tribe Obstacles
Trojan Dash
Trojan Race
Trojan Warrior Challenge
Troop Dirty 30 Mud Run
True Mudd
Tuff Enuff
Twisted Tiger Bear Mountain Bash
Twisted Trail
Two Rivers Mudder Fudder
Udder Mud Run
Ullevi Arena Challenge
Ultimate Athlete Games
Ultimate Mud Run
Ultimate Mud Warrior
Ultra Challenge
Unbridled Mud Trials
United Hillandalers Challenge
Unleash Your Inner Warrior
UQuest
Urban Assault
Urban Assault Ride
Urban Mud Assault
Urban Mudder
Urban Ninja
Urban Training Systems
Urban Warrior Dash
USO of Missouri Mud Run
Valentine Muckfest
Van City OCR
Varsity Rush
Vengeance Run
Verona Mud Fest
Verti GLO
Victory Quest
Viking Assault
Viking Gauntlet
Viking Race
Vision Wild Run
Wake Island Mud Run
Walkers 5K
Walking Dead
Wapsi Warrior Challenge
Warrior Challenge
Warrior Creek 5k
Warrior Mud Challenge
Warrior Princess Mud Run
Warrior Run Mountain Series
Warrior Wolf
Warriors Run
Wash MO Mudder
WCSO Zombie Fun Run
Wee Warrior Dash
Weekend Warrior Race
Wellington Warrior Challenge
Wellsville Zombie Run
West Texas Zombie Run
Westchester Medical Center Trauma Mud Run
WhenLifeSucks MudRun
White Gravel Mines
Whitko Extreme Challenge
Wicked Mud Run
Wicked Slush
Wild Rumpus Race
Wild Sport Series
Wild Warrior Challenge
Wild West Mud Fest
Wild Wild West Mud Run
Wild Woodlake Mudder
Wildcat Adventure Race
Wildcat Warrior Obstacle Challenge
Wilderness Survivor Games
Williamstown Fire Department
Willow Warrior
Windsor Marines Fun Mud Run
Winter Daze Craze
WinterDASH
WIPEOUTRUN
Wisconsin Zombie Mud Run
Woman2Warrior
Wondermud
Woodland Mud Run
Woods of Terror Zombie Mud Run
World Famous Foam Run
WW Obstacle Course
X Quest
X-hill-arator
XIP Bypass Mountain Climb
Xplorathon
Xtreme Challenge Lodge Hill
Xtreme Challenge Run
Xtreme Muck Ruck
Xtreme Mud Warrior
Xtreme Obstacle Challenge
Xtreme Obstacles
Xtreme Ranger
Xtreme Warrior Challenge
Yakima Valley
Yankee Lake Mud Monster
YMCA Adventure Warrior
YMCA Mississippi Mud Mania
Yorkshire Mud Run
Yuba City Mud Run
Z Mud Run
Z Warrior Sprint
Zombie 5K
Zombie Apocalypse Run
Zombie Bolt
Zombie Challenge
Zombie Dash Hawaii
Zombie Destruction Biathlon
Zombie Escape
Zombie Fun Run 4 Life
Zombie Insanity
Zombie Invasion Run
Zombie Race LLC
Zombie Run For the Hills
Zombie Run Temecula
Zombie Rundown
Zombie Rush
Zombie Survival
Zombie Survivor
Zombie Vs Survivors Run
Zombie Zurvival Run
ZombieRush Netherlands
Zombies Mud Run
Rib Race
Ridiculous Obstacle Challenge
Rise of the Ronin
River Warrior Mud Run
Roanoke Zombie Run
Robin Run
Rock in the Mud Challenge
Rock On Adventures
Rock Running Obstacle Race
Rock Solid Mud Run
Rock Solid Race
Rockabilly Riot Urban Challenge
Rocklin Ramble
RockMan Challenge
Rogue Runner
Romp at Riddle Point
Romp in the Swamp
Roots in the Mud
Rough and Tumble
Rough Kidder
Roughneck Mud Run
Roughneck Stampede
Rowdy Run
Ruckus Obstacle Race Series
Rumble Run
Run A Muck
Run and Gun
Run and Gun Race
Run For A Cure Mud Run
Run For The Hills
Run For The Hills Mud Run
Run For The King
Run For Your Lives
Run It Like Its Hot
Run of the Living Dead
Run or Die
Run The Ranch
Run the ZA
Run To Death
Run Zombie Run
RUNdezvous Race
RunFearless
Running Dead
Running Dead 5K
Running Dirty
Running Scared
Running with the Cows
Russell County Search and Rescue
Russian River Mud Run
Sacramento Survivor Challenge
Sacramento Zombie Run
Safety Forces Endurance Challenge
Sam Michael Obstacle Course Race
Sandia OCR Mud Run
Sandman
Santa Mud Run
Santas Obstacle Challenge
Scattered and Battered
Scavenger Dash
Scotland County Survival Run
SCOUT Strong Mud Run
SEAL Trek
Shale Hill Adventure
Slippery Saints Mud Run
Smorgasbord Race
Snake Hill Slam
Soar Above The Challenge
South Walton
Southern Classic Terrain Mud Run
Space Coast Mud Run
Sparta Events
Spartan Zombie Run
Special Ops Race
Special Ops Series
Special Z Games
Speedway Series
Splat Mud Run
Sports Hangout
Spring Daze Craze
Spring Fling Obstacle Run
Springfield Urban Warrior Challenge
Spud Mud Run
Squaw Creek Army Challenge
Sqwish Sqwash
SSC City Challenge
St. Clair Scramble
Steamboat Mad Mud Run
Steelathlon
Steeplechase Challenge
Step Up For Soldiers
Stoneman Race
Storm the Fort
Strength & Speed’s OCR America
Stronghold Challenge
Stunt Challenge
Summer Daze Craze
Summer Muddin
Super Hero for SAFE
Superhero Scramble
Survival Beach
Survival Sprint
Survive the Climb
Survive the Farm
Survivorgame
Swamp Buggy Mud Blast
Swamp Dash and Bash
Swamp Romp
Swamp Stomp Mud Run
Tac Force Challenge
Tactical Elite Warrior Challenge
Talise Sandstorm
Tampa Mud Race
Tandem Race
Taskforce Live
Team Vs Terrain
Terrapin Adventues
That Dam Mud Run
The Almighty
The Battle Run
The Beast Challenge
The Blitz
The Bravest
The Bull Challenge
The Burner
The Challenge Mud Run
The Color Course
The DAM Mud Run
The Dirty Farm Run
The Dirty Rotten Scramble
The Eliminator
The Endurance Games
The Farmers Mile
The Few The Proud The Muddy
The Freeze
The Gauntlet
The Gladiator Mud Run
The Great Escape MudRun
The Great Escape Savannah
The Great Gauntlet
The Heroes Mud Run
The Hope Challenge
The Inferno
The Liquid Run
The Mad Run
The Mighty Run
The Mud Games
The Mud Run
The MudBug Run
The Muddy Mountain
The Muddy Patriot
The Parent Trap
The Real McCoy
The Renaissance Run
The Rite
The Rugged Run
The Rush Games
The Sand Pit
The Scorpion Run
The Siege Race
The Slime Run
The Stampede
The Stampede Australia
The Suffering Series
The Trident Race
The Twilight Run
The Ultimate Titan Challenge
The Urban Jungle
The Urban Trials
The Victory Challenge
The Viking Challenge
The Walking Dead Escape
The Wild Stampede
The X Run
The Young and the Restless
The Zombie Mudder
The Zombie Run
Thin Mint Sprint
ThrillSeeker 5K Stunt Run
Thunder Challenge
Tippecanoe Trail and Mud Run
Tipperary Mud Run
Titan Challenge
Titan MOB
Titan5 Challenge
TNMRA
Top Ninjas
Torture Trails
Total Life Fitness Challenge
Tough Bloke Challenge
Tough Dash
Tough Knight
Tough N Dirty
Tough Sht
Tough X Rough
Trail Toad Battle Run
Trailtroopers
Transylvania K9 Challenge
Tribal Extreme Mud Run
Tribal Quest
Tribe Obstacles
Trojan Dash
Trojan Race
Trojan Warrior Challenge
Troop Dirty 30 Mud Run
True Mudd
Tuff Enuff
Twisted Tiger Bear Mountain Bash
Twisted Trail
Two Rivers Mudder Fudder
Udder Mud Run
Ullevi Arena Challenge
Ultimate Athlete Games
Ultimate Mud Run
Ultimate Mud Warrior
Ultra Challenge
Unbridled Mud Trials
United Hillandalers Challenge
Unleash Your Inner Warrior
UQuest
Urban Assault
Urban Assault Ride
Urban Mud Assault
Urban Mudder
Urban Ninja
Urban Training Systems
Urban Warrior Dash
USO of Missouri Mud Run
Valentine Muckfest
Van City OCR
Varsity Rush
Vengeance Run
Verona Mud Fest
Verti GLO
Victory Quest
Viking Assault
Viking Gauntlet
Viking Race
Vision Wild Run
Wake Island Mud Run
Walkers 5K
Walking Dead
Wapsi Warrior Challenge
Warrior Challenge
Warrior Creek 5k
Warrior Mud Challenge
Warrior Princess Mud Run
Warrior Run Mountain Series
Warrior Wolf
Warriors Run
Wash MO Mudder
WCSO Zombie Fun Run
Wee Warrior Dash
Weekend Warrior Race
Wellington Warrior Challenge
Wellsville Zombie Run
West Texas Zombie Run
Westchester Medical Center Trauma Mud Run
WhenLifeSucks MudRun
White Gravel Mines
Whitko Extreme Challenge
Wicked Mud Run
Wicked Slush
Wild Rumpus Race
Wild Sport Series
Wild Warrior Challenge
Wild West Mud Fest
Wild Wild West Mud Run
Wild Woodlake Mudder
Wildcat Adventure Race
Wildcat Warrior Obstacle Challenge
Wilderness Survivor Games
Williamstown Fire Department
Willow Warrior
Windsor Marines Fun Mud Run
Winter Daze Craze
WinterDASH
WIPEOUTRUN
Wisconsin Zombie Mud Run
Woman2Warrior
Wondermud
Woodland Mud Run
Woods of Terror Zombie Mud Run
World Famous Foam Run
WW Obstacle Course
X Quest
X-hill-arator
XIP Bypass Mountain Climb
Xplorathon
Xtreme Challenge Lodge Hill
Xtreme Challenge Run
Xtreme Muck Ruck
Xtreme Mud Warrior
Xtreme Obstacle Challenge
Xtreme Obstacles
Xtreme Ranger
Xtreme Warrior Challenge
Yakima Valley
Yankee Lake Mud Monster
YMCA Adventure Warrior
YMCA Mississippi Mud Mania
Yorkshire Mud Run
Yuba City Mud Run
Z Mud Run
Z Warrior Sprint
Zombie 5K
Zombie Apocalypse Run
Zombie Bolt
Zombie Challenge
Zombie Dash Hawaii
Zombie Destruction Biathlon
Zombie Escape
Zombie Fun Run 4 Life
Zombie Insanity
Zombie Invasion Run
Zombie Race LLC
Zombie Run For the Hills
Zombie Run Temecula
Zombie Rundown
Zombie Rush
Zombie Survival
Zombie Survivor
Zombie Vs Survivors Run
Zombie Zurvival Run
ZombieRush Netherlands
Zombies Mud Run