Advocating for Trails and Mountain Biking in San Diego Since 1994

Over 1100 members have stepped up to help SDMBA make mountain biking better for everyone in San Diego County. SDMBA advocacy volunteers provide a unified voice for trail users in public land use policies favoring sustainable outdoor recreational opportunities. Liaisons, trail builders, and other advocates seek out and build harmonious unified alliances and partnerships with businesses, land managers, and communities. Specialized volunteer-run programs support this mission and further inspire youth to explore and learn about nature and become its future stewards.

Events Feed


Trail Work: Black Mountain/Black Widow

Please be aware this will be street parking and we are asking for courtesy in the neighborhood. BE QUIET until we are in the open space. We have to be model trail stewards. Nobody ...


California Trails and Greenways Conference

California Trails & Greenways provides high-quality education and networking opportunities for urban, rural, and backcountry trail professionals.  Join leading trail exper...


SDMBA Advocacy Meeting

Join for a special San Marcos Edition of our Monthly SDMBA Advocacy Committee meeting.
Arrive at 6:30 p.m. for snacks and mingling. Meeting to start at 7 p.m.


News Feed

Calavera Trails Advocacy Meeting and Other Efforts

April 17, 2019

Concerned about recent increased access issues at Calavera?

Special Offer for Members! Balance Insurance for Cyclists

January 30, 2019

Balance offers affordable injury insurance for cyclists. It’s like a helmet for your wallet.

2019 Archipelago Ride Registration Open NOW!

January 18, 2019

Aloha! Don't miss the tropical adventure that is #archride2019