Active.com: Adventure Racing - Adventure Racing/Eco-Challenge racing and training information, online registration for national and world-wide adventure races, race coverage, and message boards for adventure racing enthusiasts.
Adventure Race Reports - Offers message board with reports, stories and articles. Also features a world wide calendar with links to related sites.
Adventure Racing Chronicles - A multimedia site delivering training information for adventure racers. Includes training tips, equipment, nutrition, technical skills, navigation, team dynamics, gear reviews and cost comparison.
Adventure Racing Zone - Provides news, forum, event calendar, photo galleries, articles, and related links.
baarbd.org - Bay Area Adventure Racing Babes and Dudes - Adventure racing portal serving Northern California. News, calendar, forums, AR glossary, email list, teams, athletes, races, cross-training, gear and nutrition. Focuses on connecting athletes, race directors and vendors.
Checkpoint Zero - Adventure Racing news, events, forums, a growing comprehensive directory.
Dynamic Adventure Racing - Company based in Southern England who offer one day events for novice racers. Calendar of events together with race reports.
Full Moon Adventure Company - Based in Alberta and British Columbia. Our Adventure Racing series offers something for both seasoned and novice racers alike. Choose from a 6, 12 or 36 hour race.
Hairy Scary Evolutions - Offers information, tips, links, event calendar, and training for individuals and team building oriented to the sport of adventure racing.
Indiana AR - News and services for adventure racers and multisport enthusiasts in Indiana (USA) and surrounding states.
Infiterra Sports LLC. - Michigan adventure racing including cycling, canoeing, triathlons, rappelling, climbing, orienteering, and other adventure sports.
Odyssey Adventure Racing - Extreme, long and short-distance racing and training provided by the people who have done the races.
SleepMonsters.com - Worldwide portal with news, events, race reports, calendar, forum, photos, team and racer profiles, and training articles and advice. Also provides special sections for Australia, Canada, United Kingdom, and United States.