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


POSTPONED: Trail Work: Laguna/BLT

POSTPONED due to winter weather and predictions of snow on the ground.  Stay tuned for new date!  

Join us for some trail rehab near the Sunset Trail ...


Winter Brew Fest 2018

We are super stoked about our NEW LOCATION at the Fleet Science Center in Balboa Park! They will be showcasing a MythBusters exhibit. This special 1-day only brew fest will celebra...


Ride with A Ranger #3

Mountain Bike Ride with a MTRP Park Ranger and SDMBA volunteers! 
This is the last ride in a series of 3 geared for intermediate riders. Arrive around 8:30 a.m. and hav...

News Feed

Arch Ride 2018 SOLD OUT

February 13, 2018

Thanks to our members who signed up early! We are SOLD OUT. Looking forward to the best Arch Ride ever on 4/7/2018! Thanks

A letter to IMBA from Jim Hasenauer

February 5, 2018

Jim Hasenauer is one of IMBA's founders and a former president of the organization. Today, he publicized a letter he sent to IMBA's Board of Directors...

UPDATE: Palm Canyon Land Swap

January 31, 2018

On January 25th, 2018 the Bureau of Land Management released the Final EIS and Record of Decision (ROD) to approve a proposed land exchange between th...