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International Mountain Bicycling Association

Sonoran Desert Mountain Bicyclists' mission is to Build, Ride, and Protect trails in Tucson and Southern Arizona. SDMB is Southern Arizona's chapter of the International Mountain Bicycling Association Tax ID 27-4499320


Sonoran Desert Mountain Bicyclists (“SDMB”) was founded in 1998 with the mission to Build, Ride, and Protect trails in Tucson and Pima County, Arizona.  SDMB has more than 350 paying members and several thousand supporters, and is the southern Arizona chapter of the International Mountain Bike Association.  SDMB leads monthly social rides, coordinates monthly trail building and maintenance events, hosts community events, and works with land managers, governmental entities, and other user groups to advocate for mountain biking, trails, and open space.  SDMB collaborates with Pima County Natural Resources, Parks, and Recreation (NRPR), Coronado National Forest, the City of Tucson, the Town of Marana, the Town of Oro Valley, and the Arizona Trail Association on various trail maintenance and development projects.

SDMB's current major projects include the Big Wash Trail, the 100-Acre Wood Bike Park, the McKenzie Ranch XC Race Venue, and ongoing trail development at Starr Pass.