The Southwest Idaho Mountain Biking Association (SWIMBA) is a 501(c)(3) nonprofit committed to building, protecting, and sustaining world-class multiuse trails in Southwest Idaho. Volunteer-led since the 1990s, SWIMBA has shaped the region's trail network — from Ridge to Rivers to Eagle Bike Park, Avimor, and Bogus Basin.

The San Diego Mountain Biking Association (SDMBA) is a volunteer-driven, non-profit organization dedicated to maintaining and improving sustainable trail access for mountain biking in San Diego County. Formed in 1994, SDMBA is one of the largest regional trail advocacy organizations in the US with more than 1,700 members.

The Trail Alliance of Southern Utah (TASU) is a non-profit founded in 2010 to create, enhance, and protect world-class trail experiences in Washington County, Utah. Passionate trail riders and builders committed to balancing use, expansion, and preservation of one of mountain biking's premier destinations.

Boise Bicycle Project is a community-focused nonprofit that promotes the personal, social, and environmental benefits of bicycling. Through inclusive access to refurbished bicycles, repair, educational experiences, and advocacy, we strive to build a stronger bicycling community. We believe that Boise has the potential to be the bicycling capital of America, a place where everyone can experience the freedom and countless opportunities a bicycle can create.