Marinduro 2026 brought together 459 racers, nearly 100 volunteers, and the entire Marin mountain bike community for California’s biggest enduro race weekend filled with perfect trails, high energy racing, live music, and nonstop celebration.

MTS joined trail leaders from across NorCal for a weekend of learning, riding, and connection at the Singletrack Summit. They returned energized with new ideas, stronger relationships, and fresh momentum to bring back to the MTS community.

Meet Peter, Daniel, and Rowan, Marin Trail Steward's 2025 Volunteer of the Years!

As we close out this transformative year, we’re thrilled to share the milestones your support made possible, and how your continued investment will elevate the future of mountain biking in Marin.

A decade in the making, Caballo Rojo officially opened on December 13, 2025. This downhill only mountain bike trail offers a new exit from the Camp Tamarancho trail network, creating a safer, and more fun experience for riders.

Access4Bikes Foundation will become Marin Trail Stewards this fall. This change marks a pivotal moment in the organization’s growth—from a focused mountain biking advocacy group to a broader community nonprofit committed to inclusive access, environmental sustainability, and long-term stewardship of Marin’s trail systems for bikers and hikers alike.

Shovels hit dirt at Tamarancho—Caballo Rojo Phase 2 begins with bridges, berms, and big vision.

On the longest day of the year, Marin County’s rugged trails thundered with the energy of Solstice on Solstice—a downhill mountain bike race like no other.

Marin Water has released its E-Bike Class I Pilot Program Implementation Plan, a two-year odyssey of trail counters, wildlife monitoring, and visitor surveys with the financial burden falling squarely on the community.

Executive Director’s Statement on the MMWD Settlement Regarding Pilot Trails

Trail Access Win: Liberty Gulch Opens to Bikes

Meet Jeff Vickers, Access4Bikes' 2024 Volunteer of the Year and the ultimate trail steward!

Riders gather to learn critical bike handling skills from Brian Astell, Trailworks.

Critical mass came together on Mt. Tam in peaceful demonstration against pilot project injunction.

Pilot Projects remains in legal gridlock as judge’s ruling sides with plaintiffs.

One of our favorite community events of the year in Fairfax!

Matt Samson (pictured here with County Supervisor Brian Colbert at Biketoberfest) sat down with our community to answer questions about the lawsuit and what’s next.

New signs now idle due to temporary restraining order brought by lawsuit.

Access4Bikes inspires volunteers to help maintain trails on Mt. Tam ahead of Pilot Project.

What we know about the astounding new fines for repeat offenses on Mt. Tam and where we're going from here.