Trail Running calendar near San Martin 2025-2026

The Bay Breeze event in San Leandro offers a scenic and romantic running experience along the San Francisco Bay, starting and finishing at San Leandro Marina Park. Participants can choose from a half marathon, 10K, or 5K race, all featuring mostly flat, easy bayside trails that stay close to the wat..

Redtail Ridge is a trail running event held at Lake Chabot Regional Park in Castro Valley, California. The race offers multiple distances including 5K, 10K, half marathon, 30K, and 50K, catering to a wide range of runners from beginners to those seeking personal records. The course features eucalypt..

The Marin Ultra Challenge is a premier long-distance trail race held in Marin County, California, featuring 50-mile and 50K distances. The course offers about 11,000 feet of elevation gain for the 50-mile race, traversing scenic trails through the Marin Headlands, Mt. Tamalpais, and Muir Woods.Runne..

The Western Pacific Marathon event, held at Quarry Lakes Regional Recreation Area in Fremont, California, offers runners a choice of half marathon, 10K, and 5K distances. The course is mostly flat, following the historic Western Pacific Trail, which was originally used in the 1800s to transport grav..

The Golden Gate Headlands Marathon will take place in Mill Valley on Saturday 4 April 2026. You can run between 10 and 26 miles.

The Diablo Trails Challenge will take place in Walnut Creek on Saturday 4 April 2026. You can run between 5 and 50 kilometers.

The Romancing the Island Half Marathon will take place in Belvedere Tiburon on Saturday 11 April 2026. You can run between 10 and 13 miles.

The Badger Cove Half Marathon will take place in Livermore on Saturday 18 April 2026. You can run between 5 and 13 miles.

The Mt. Tam Wild Boar Half Marathon will take place in Mill Valley on Saturday 25 April 2026. You can run between 10 and 13 miles.

The Trailquake will take place in Saratoga on Sunday 10 May 2026. You can run between 5 and 13 miles.

Run for Amma is an annual charity running event held at Skyline Ridge Open Space Preserve in Los Gatos, California, celebrating its 15th anniversary in 2026. The event offers three race distances: a challenging 50K with 5,266 feet of elevation gain, a 30K with 3,629 feet of elevation gain, and a 10K..

The Wildcat Half Marathon will take place in El Sobrante on Saturday 16 May 2026. You can run between 5 and 13 miles.

The Nitro Trail will take place in San Pablo on Saturday 30 May 2026. You can run between 5 and 13 miles.

The Toro Park Trail Run, held in Salinas, California, offers runners a scenic experience through the iconic Bay Area landscape. Participants can choose from three distances: a 10K, a half marathon (21K), and a full trail marathon. The course features rolling golden hills, smooth trails, and sparse c..