- Eventrate.com
 - Community site dedicated to news and reviews of adventure races, ultra, and extreme sporting events. Includes forums, training advice, an events calendar, and real diaries of previous races. - Frontier Adventure Racing
- Challenging race series in Canada, touring a variety of terrain.
- New York Adventure Racing Association (NYARA)
- Promotes the sport and serves athletes in the tri-state area.
- Odyssey Adventure Racing (OAR)
- Race promotion organisation that specialises in premier ultra-distance and extreme sporting events.
- Southern California Adventure Racing Buddies (SCARAB)
- Adventure racing club for Southern Californians to find teammates, discuss training, and more.
- United States Adventure Racing Association (USARA)
- Official site, with links to race information, Association registration, and more.
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