The Massive List of 137 OCR Facebook Groups (2023)
For many in obstacle course racing, it's about the community and the people you meet along the way. As such, here is a ridiculous list of OCR Groups you can join on Facebook. This is not an exhaustive list, and if you know of others, feel free to link them in the comments and we'll add them to the list.

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Groups are categorized by specific interests, races, and geographical location.
Ultra Distance OCR Groups:
OCR Tribe - WTM, Ultra, and Extended Time/Distance OCR Group
Spartan Ultra World Championships 24
Europe:
Obstacle Course Racing Community | Croatia
Obstacle Course Racing (OCR) Essex
Sons Of Mudarchy MUDCRO OCR UK Charter
Savage Race:
Asia, Australia, New Zealand:
Obstacle Course Racing (Australia)
Obstacle Course Racing (New Zealand)
Obstacle Course Race (Philippines)
Spartan Malaysia Community Group
Tough Mudder:
Tough Mudder North America Challenges
Tough Mudder Orlando - Central Florida
Tough Mudder UK Official Training Group
World's Toughest Mudder Community
East Coast USA:
Central New York OCR & Trail Running
Charlotte Obstacle Race Enthusiasts
Fayetteville Spartans and OCR fans
First Coast Spartans (North East Florida)
Georgia Obstacle Racers and Mud Runners (GORMR)
Sons of Mudarchy MUDCRO OCR NJ Chapter
Southeast Ohio Obstacle Course Racing
West Coast USA:
Colorado Obstacle Race Training
Colorado Obstacle Racers group page
"Central" USA:
San Antonio Obstacle Course Racers
Canada:
Alberta Obstacle Course Racers
Official Spartan Canada Volunteers
SPARTAN RACE Western Canada Street Team
Spartan By Name:
Spartan Trifecta World Championship Community
Here's a huge list of other less-easily-categorized groups:
All Things Obstacle Course Racing
BATTLE OBSTACLE RACING COMMUNITY
City Challenge Race | Athlete's Forum
Everything Obstacle Course Racing
Obstacle Course Racing support, health, and fitness
Obstacle Race Magazine Community
Obstacle Race Training - OCR FAMILY
OCR and Race Registration Trades!
OCR Marketplace: Buy, Sell, Trade
OCR United :: Uniting Everyone OCR ::
OCR World Championships Athletes
Team RWB Obstacle Course Racing
4 Workouts Per Week
The Forge training program provides you with 3 workouts per week designed to improve your overall fitness for Obstacle Course Racing. Your strength, speed, and endurance will all be tested. Each week of programming will help you improve your running and grip strength. It's time to forge yourself into the best OCR athlete you can be! Click to learn more.