Trail Running calendar near San Ramon 2025-2026

Mt Tam Wild Boar Half Marathon & 10K takes place in Mt Tamalpais State Park, Mill Valley, California. The coastal ridge course blends rolling single-track with paved sections, offering views of the Pacific Ocean, Bolinas Lagoon, and Marin County watershed. Runners traverse Ridgecrest Blvd along Boli..

The Miwok 100K is a renowned trail ultramarathon held near Stinson Beach, California, just under an hour from San Francisco. The challenging 100-kilometer course features 11,800 feet of elevation gain across single-track trails, dirt roads, and a short paved section. Runners enjoy stunning views of..

The Tails & Trails Charitable Walk/Run takes place in Windsor, California, at 11010 Estate Lane. This event offers a 5K run and a Dogwood Dash, with a virtual option allowing participants to complete any distance. The event supports a charitable cause and provides a welcoming atmosphere for runners..

Enviro-Sports presents the Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile, a trail race held in Stinson Beach, California. The 36th edition offers Marathon, Half Marathon and 7 Mile distances, with entries capped at 300 participants. From Stinson Beach Park, racers head into the Dipsea tr..

Trailquake 2026 is Brazen Racing’s trail event at Sanborn Park, 16055 Sanborn Rd., Saratoga, CA. It offers 5K, 10K, and half-marathon distances. Runners traverse redwoods and pines on spectacular single-track trails, with ascents to peaks that reward you with panoramic views.The course suits all lev..

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..

Rim Rock 50 Mile Trail Challenge is the inaugural ultramarathon in Napa Valley, staged at Skyline Wilderness Park and weaving through the Napa Open Space Preserve and the new Suscol Headwaters Trail System. The event offers a 50-mile solo option or a two-person relay, with two roughly 26-mile loops..

Napa Wilderness Trail Runs, held at Skyline Wilderness Park (2201 Imola Ave, Napa, CA), offers a spectrum of trail races from a 10K up to a 50K. The event emphasizes accessibility for all levels, with a 50K and 30K designed with guidance from ultra runner Angela Abbey. The courses feature Rim Rock T..

Wildcat 2026, held at 3800 Clark Road in El Sobrante, California, offers a Half Marathon, 10K, and 5K. The page highlights spectacular 360-degree views of the Bay Area from the course. Specific route details aren’t described, but the event is run by Brazen Racing and takes place within East Bay Regi..

Sonoma Coast Trail Runs, presented by SkyBreaker Racing, takes place on the trails of Sonoma Coast State Park along Northern California’s coastline, just south of Jenner, Duncans Mills, and the Russian River. The event offers four distances: 50K, Trail Marathon, 30K, and Half Marathon, all run on ru..

Nitro Trail 2026 is a trail-running event held at Point Pinole Regional Shoreline Park, 5551 Giant Highway, San Pablo, California 94806. It offers three distances: a half marathon, 10K, and 5K, appealing to a range of runners and walkers. The event is branded with an energetic theme, described as an..

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..

Bay Area 100 is a 100-mile ultramarathon held in Oakland, California. The race is associated with a location at 12500 Campus Drive in the Bay Area, indicating the event’s hub in Oakland. The official site bayarea100.com provides registration details, noting that registration opens on October 1, 2025..

The Skyline 50k Endurance Run will take place in Castro Valley on Sunday 2 August 2026.