Trail Running calendar near Orinda 2025-2026

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 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..

The Muir Woods Marathon, organized by Enviro Sports, is a trail running event held near Stinson Beach, California. It offers multiple race distances including a full marathon, half marathon, and a 7-mile run. The course features scenic trails through the iconic Muir Woods and surrounding natural lan..

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 Rim Rock 50 Mile Trail Challenge is an inaugural ultramarathon set for May 16, 2026, in Napa Valley, California. Starting at Skyline Wilderness Park, the race covers approximately 50 miles through rugged, scenic trails including the Napa Open Space Preserve and the newly opened Suscol Headwaters..

The Napa Wilderness Trail Runs, held at Skyline Wilderness Park in Napa, California, offer a variety of trail running distances including 10K, 21K (half marathon), 30K, and a challenging 50K ultra marathon. The courses feature scenic routes with steep climbs, notably the Rim Rock Trail, providing st..

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

Sonoma Coast Trail Runs, hosted by SkyBreaker Racing, take place in Sonoma Coast State Park near Duncans Mills, California. The event offers multiple distances including a 50K, trail marathon, 30K, and half marathon, all featuring challenging elevation gains ranging from 2,800 to 7,000 feet. Runners..

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