Celebrating 25 years of improving trail access for mountain biking in San Diego County

Over 1400 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.

Got Trail Work?  We do!  Volunteers needed.  Check all opportunities on our Event Calendar.  

Events Feed


Trail Work: Sycamore Goodan Ranch

Join us for trail work on Martha's at Sycamore/Goodan Ranch in coordination with the County of San Diego
Please RSVP so we can ensure you are treated well after the work day...


Trail Work: Rancho La Costa Preserve

Join us for trail work at Rancho La Costa Preserve in coordination with the Center for Natural Lands Management.
Please RSVP so we can ensure you are treated well after the ...


Trail Crew Leader Training - Daley Ranch

This FREE class designed for current SDMBA trail liaisons and other core volunteers.  Curriculum will include class room presentation and discussion as well as pract...

News Feed

Bike Magazine tells story of Sweetwater Bike Park

January 13, 2020

Read about how Sweetwater Bike Park came to be so awesome!

Sweetwater Bike Park is OPEN!

January 5, 2020

9:30 - sunset daily (weather dependent) FREE

SDMBA partners with California Mountain Biking Coalition

November 22, 2019

California trails need a state wide voice and CAMTB is providing it!
Proud member of the California Mountain Biking Coalition  www.CAMTB.org