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


2018 Volunteer Appreciation Party


It's time to give a big pat on the back to our amazing SDMBA volunteers.  Join us at Stone Brewing in Liberty Station for some brews, munch...


Family Ride at Penasquitos Canyon

Join us for a family friendly bike ride as we help the County of San Diego celebrate the 20th Anniversary of the Multiple Species Conservation Program (MSCP)
Meet at 9 a.m. ...


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...

News Feed

Recap: 2018 Mount Laguna Trail Fest presented by ZOIC Clothing

October 16, 2018

An amazing time in the forest playing bikes!

Trail Fest is this weekend! All passes sold out.

October 12, 2018

We are excited to meet everyone this weekend for Trail Fest! We're sold out for both weekend and day passes. Only people with passes will be allowed...

Update on Mission Trails Regional Park Master Plan

August 30, 2018

Check out the Vlog of Kevin Loomis - President of SDMBA and the multiuse CAC rep for Mission Trails Regional Park. Kevin discusses where we are with...