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


Family Mountain Bike Ride #optoutside

Join us for a fun family MTB ride to celebrate #optoutside day, REI's initiative to get people outside!  Choose a trail instead of a sale!  

Meet at 9...


Trail Work: Black Mountain/Black Widow

Black Widow is about to become reality. After years of planning, hinting, and delays, the building of Black Mountain's premiere flow trail is now a reality.

Our firs...

News Feed

SDMBA partners with the Canyon Belgian Waffle Ride for 2019

November 15, 2018

The Canyon Belgian Waffle Ride announces the San Diego Mountain Biking Association as charity partner for 2019!


November 5, 2018

Help the Bitterroot Backcountry Cyclists in their quest to get an many public comments objecting to the US Forest Service's decision to close the Sapp...

Seeking Board Member Applicants

October 18, 2018

SDMBA currently has one open Board seat and is looking for applicants. Please contact Kevin Loomis at if interested.