Improving trail access for mountain biking since 1994

Over 1500 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


12th Annual Bike the Bay with Off Road Option

Ride the bridge, Bike the Bay! On Sunday, August 25, 2019  cruise around the San Diego Bay and enjoy your only opportunity to ride across the San Diego Coronado Ba...


Trail Work: Big Laguna Trail/Upper Noble

Yes, we know it is very warm, ok, you can call it hot, BUT can you sacrifice some hours of your weekend to have a better trail?

You've see us working out there, aren...


Public Meeting #2: Alpine County Park

You're invited to an open house to discuss a new community park in Alpine. SDMBA would like our members and friends to attend to submit comments asking for a pump track, bike park ...

News Feed

Join or Renew by August 31!

June 30, 2019

You could win a Shimano XT M8100 Group!

And the winner is...

June 2, 2019

The winner of our May Membership Giveaway is Shawn Farrow! Shawn gets a two night stay at Bear Belle Cabins and 4 day passes to Snow Summit!


May 23, 2019

Vote for SDMBA! Voting closes on June 7! Jenson USA is donating the proceeds from their 2019 #keeppedaling hat to the trail association with the m...