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


Board Meeting

The monthly Board Meetings are held on the 3rd Wednesday of every month at Mission Trails Regional Park, Visitor’s Center Library.  
Board meetings are open to th...


Trail Work: Black Mountain/Black Widow

Plan on a solid day of work. We are continuing to build the tread, taking advantage of the splendid weather. We are moving further up the hill to work on areas the mini excavator c...


San Marcos Trails Day

Join us for San Marcos Trails Day. There will be guided hikes  and equestrian ride with this FREE event and an expo area at Lakeview Park. 

SDMBA w...

News Feed

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

Public Comment: Steel Bridge Staging Area

December 29, 2018

Letters of support needed for the new staging area proposed at the Steel Bridge in Rancho San Diego. Click link for details