Trail Running calendar near Walnut Creek 2025-2026

The Calero Trail Run - Winter takes place at Calero County Park in San Jose, California, offering a variety of distances including 50K, trail marathon, 25K, half marathon, 15K, 10K, 5K, mile, and a kids run. The course features diverse terrain with single track trails, hills, dirt paths, oak trees,..

The Peacock Gap Trail Run, hosted by Inside Trail Racing, takes place at China Camp State Park in San Rafael, California. Scheduled for December 6, 2025, the event offers three distances: 10K, half marathon, and 30K, with courses featuring scenic single-track trails, forested areas, and views of Mt...

The Hunter S. Thompson Fear & Loathing is a unique, no-fee urban ultra running event held annually in San Francisco, CA, since 1985. Participants can choose between a 50K or 50-mile single-loop course that starts and finishes at Twin Peaks, offering stunning city vistas.The route covers iconic touri..

The Summit Rock Half Marathon, held in Saratoga, California, offers runners and walkers a scenic experience through the redwood groves of Sanborn County Park in the Santa Cruz Mountains. Participants can choose from a half marathon, 10K, or 5K race, all featuring miles of single-track trails with fi..

The Folsom Lake Point to Point Trail Half Marathon is a scenic trail race held in El Dorado Hills, California, near Sacramento. The 13.1-mile course is predominantly single track (95%) with some dirt road (5%), running alongside the picturesque Folsom Lake. Runners experience a mix of gentle rolling..

The Hark the Herald Half Marathon & 10K is an annual running event held at Angel Island State Park near Belvedere Tiburon, California. Celebrating its 37th year in 2025, the race features a scenic, hilly loop trail around Angel Island with stunning views of the Golden Gate Bridge, San Francisco, Alc..

The Brazen New Year's Eve event, held at Lake Chabot in Castro Valley, California, offers runners and walkers the opportunity to participate in a half marathon, 10K, and 5K trail races. This festive race encourages participants to close out the year with a scenic run on beautiful trails, welcoming a..

Brazen New Year's Day is an annual running event held at Lake Chabot in Castro Valley, California. It offers participants the choice of a half marathon, 10K, or 5K race, all set on scenic trails around the lake. The event is known for its invigorating course featuring challenging ascents and descent..

The Hacienda Hills Trail Run - Winter is a trail running event held at Almaden Quicksilver County Park near San Jose, California. It offers nine race distances ranging from a Kids Run and 1 mile to challenging ultra distances like 50K and a trail marathon. The courses feature increasing elevation ga..

The IPA Beer Trail Runs, hosted by TBF Racing, take place at Granite Beach, Folsom Lake State Recreation Area in California. The event features two scenic trail races along the lake's shoreline: a 12K (7.5 miles) and a 5K (3.1 miles), both on well-marked single-track trails. Runners enjoy a challeng..

The Coyote Hills Run is a scenic running event held at Coyote Hills Regional Park, located at 9400 Quarry Road, Fremont, California, along the eastern shoreline of San Francisco Bay. The event offers multiple race distances including a 5K, 10K, and a half marathon, welcoming runners and hikers alike..

The 2026 Gumby 10K and 5K are trail running events held at Granite Beach, Folsom Lake State Recreation Area. The races feature scenic courses along the shores of Folsom Lake, with well-marked trails and enthusiastic volunteers providing support. Participants can enjoy aid stations offering water, el..

The Folsom Lake Sweetwater Trail Run, held at Folsom Lake State Recreation Area in El Dorado Hills, CA, offers a variety of distances including Kids Run, 1 Mile, 5K, 10K, 9 Mile, Half Marathon, 30K, Trail Marathon, and 50K. The course is predominantly single-track (95%) with some dirt road sections,..

The Mt. Umunhum Trail Conquest - Winter is a trail running event held at Almaden Quicksilver County Park in San Jose, California. The race offers multiple distances including a 50K, marathon, 30K, half marathon, 7-mile, 5K, mile, and a kids run.The longer courses traverse the scenic Sierra Azul Open..

The Escape from Folsom is a trail running event held at Granite Beach, Folsom Lake State Recreation Area. It features two race distances: a 10-mile run and a 5K (3.1 miles). Both courses offer scenic trails adorned with wildflowers and include multiple aid stations providing water, electrolyte bever..

Bay Breeze in San Leandro is a scenic running event held at San Leandro Marina Park along the San Francisco Bay. Scheduled for February 14, 2026, it offers a half marathon, 10K, and 5K distances suitable for runners and walkers of all levels. The course features a mostly flat, easy bayside trail tha..

The Napa Valley Trail Marathon, Half Marathon, and 10K is an annual trail running event held at Bothe-Napa Valley State Park in Saint Helena, California. Now in its 34th year, the race features challenging courses with hills, streams, and rocky terrain along lush single-track trails. Participants ca..

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 Bad Ass Backyard Ultra (B.A.B.U.) is a challenging endurance running event held at Dry Creek Parkway in Rio Linda, California, near Sacramento. Participants run a 4.16-mile loop every hour, starting on the hour, and must be ready to begin each new loop on time or face elimination. The race conti..

The Golden Gate Headlands Marathon, Half Marathon, and 10K is an annual trail running event held in the scenic Marin Headlands near Mill Valley, California. Participants start and finish at the Historic Gunnery Range in Rodeo Valley, running through a course that combines single-track hiking trails..