Trail Running calendar near San Jose 2026-2027

A two day trail running event near Monterey featuring a 50 mile and 50K on February 6 and 25K and 10K on February 7. Races run on Fort Ord trails with varied terrain, multiple aid stations, drop bag support, and official timing.

Experience the unique Coastal Mountain Habitat and Pacific Coast views at this trail event in Pacifica. With distances from a kids dash to a 50K there are options for many different types of trail runners.

Trail races at Lake Chabot Regional Park in Castro Valley with 50K, 30K, Half Marathon, 10K and 5K on February 20, 2027.

The Sanborn Trail Challenge will take place in Saratoga on Saturday 27 February 2027. You can run between 4 and 13 miles.

Experience a trail run across the forest and hills of Angel Island with views of San Francisco and the Golden Gate. Choose from multiple race distances including a youth dash and enjoy a picnic at Ayala Cove.

The Race to the Top of Mt. Umunhum will take place in San Jose on Saturday 6 March 2027. You can run 13 miles.

A trail ultramarathon in Marin County on March 13, 2027, with 50K and 50 Mile courses over coastal ridges, redwood single-track, and significant elevation.

A three day trail running weekend in Marin County offering a point to point 100K plus single loop 50K and 28K that summit Loma Alta and Big Rock Ridge.

A multi-distance trail event on March 22, 2025 at Calero County Park in San Jose offering runs from a kids race to a 50K, single track and dirt-road courses, multiple aid stations, and per-distance time limits.

Multiple trail distances run through Redwood Regional Park on March 20, 2027 at Chabot Space & Science Center. Routes use East Ridge, West Ridge, Stream and Bridle trails and distances were measured with a Rolatape surveyor's wheel.

A mostly-flat running event at Quarry Lakes in Fremont on March 27, 2027, offering a half marathon, 10K, 5K and a remote runner option.

A spring trail race at Pueblo Day Use Area in Santa Teresa County Park on April 5, 2025 offering 5K, 10K, 10 Mile and a half marathon across marked, hilly trails with aid stations and a four hour half marathon limit.

Obstacle course weekend with races from 5 km to 50 km, held April 3 and 4 2027 at Modesto Reservoir Regional Park near Waterford CA.

Trail event in Walnut Creek on April 3, 2027 offering 50K, half marathon, 10K and 5K options with part of fees supporting Save Mount Diablo.

A trail event at Skyline Ridge Open Space Preserve offering distances from a 50 yard kids dash to a 50K race. Routes run largely on the Bay Area Ridge Trail with ocean and Santa Cruz Mountains views.

Badger Cove is a running event in Livermore, CA on April 17, 2027 offering a half marathon, 10K, 5K and a hiker division. Registration opens January 1 and closes February 2 with fees varying by event.

A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.

No Foolin' Foot Race in San Carlos on April 24, 2027 offers 15K, 10K, 5K and a 1K kids trail course across Big Canyon, Eaton and Pulgas Ridge, with proceeds supporting local open space trail maintenance.

Trail running in the Stinson Beach and Muir Woods area with marathon, half marathon and 7 mile options. The event is organized by Enviro Sports and is tentatively scheduled for May 2027.

A timed half marathon through eight Napa Valley wine estates finishing in Yountville. The event includes a finish line Wine Village with live music and complimentary wine tastings.