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


San Marcos Trails Day

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


SDMBA Advocacy Committee Meeting

Monthly SDMBA Advocacy Committee meetings are generally on the 1st Monday of the month, 6:00 pm to 8:00 pm.

The Advocacy Committee is focused on presenting opportuni...


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...

News Feed

10% off Season Passes for Snow Summit and Mammoth Bike Park

May 11, 2018

Adult Snow Summit/Mammoth Bike Park Season passes can be purchased through SDMBA for 10% off retail. We must get at least 15 orders for it to work. ...

Donations made to local partners!

May 8, 2018

Archipelago Ride proceeds to go support local partners and local trails!

Public Comments needed for Orosco Ridge Trail Plan

May 3, 2018

Comments due May 25, 2018 for 20 miles of new trail on the Cleveland National Forest!