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...


SD Trek Girls Beginner Friendly Ride

Please join the SD Trek Girls for a fun ride around Lake Hodges. Lake Hodges offers everything from flat(ish) fire road to flowy single track - a little something for everyone! All...


Mission Trails Deerfield BMX Loop Trail Work

We will be working on the single track access trail to the Mission Trails Park BMX area located off the Deerfield BMX loop in partnership with City of San Diego rangers.   ...

News Feed

Please sign this petition to State Parks to allow for more MTB access

August 13, 2017

Please add your voice to this petition to the California State Parks drawn up by the Mountain Bikers of Santa Cruz. We have our own issues with our lo...

Please sign petition to preserve the Santa Margarita River Parkway Forever

August 9, 2017

Please help our Fallbrook trail advocates as they fight for access to the beautiful Santa Margarita River Parkway. Check petition at this link.

REI offers Wilderness First Aid Class - August 19 and 20

August 6, 2017

Whether spending time in the backcountry is your passion or your profession, you should never have to ask, "What do I do now?"