Trail Running calendar near Napa 2025-2026

The SPASM Crystal Springs Trail Run is an exciting running event taking place in Huddart Park, Woodside, CA. Scheduled for August 31, 2025, it features multiple race distances including an 8K, Half Marathon, 35K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. Participa..

The Stevens Creek Striders Reservoir Run offers a scenic trail running experience in Cupertino, CA, featuring a Half Marathon, 11K, and a Lollipop Loop charity run. Participants can enjoy the beautiful trails of Stevens Creek County Park, with varying elevations and challenging terrains suitable for..

The Diablo Trail Run, scheduled for September 7, 2025, in Clayton, California, offers a variety of race distances including a 4-mile, 10-mile, half marathon, marathon, and 50K, along with a free Kid's Run for children aged 6 and under. The event takes place in the scenic Mount Diablo State Park, fea..

The Mammoth Bar Trail Runs, organized by Skybreaker Racing, will take place in the scenic Mammoth Bar OHV Area within the Auburn State Recreation Area, known for its challenging terrain and stunning views of the American River Canyon. Scheduled for September 7, 2025, the event features three race di..

The South Hills Single Track Trail Run - Summer is an exciting trail running event held at Calero County Park in San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, Half Marathon, and shorter races down to a Kids Run. The course features beautiful single tr..

The Berkeley Trail Adventure is an exciting running event set in the scenic Tilden Regional Park and Wildcat Canyon in Berkeley, California. Participants can choose from four distances: 10K, Half Marathon, 35K, and 50K, making it suitable for runners of all experience levels. The course features a m..

The Gold Rush Growler Trail Runs feature a 10-mile and a 5K race, taking place at Granite Beach, Folsom Lake SRA. Participants can enjoy scenic courses along the shoreline and single-track trails. The event includes new courses for 2025, with awards for top finishers and age group categories.Each co..

The Mt. Umunhum Marathon, known as the Race to the Top and Down, offers an exhilarating trail running experience in the scenic South Bay Area hills. Participants will start at the Hacienda Entrance of Almaden Quicksilver Park, ascend to the summit of Mt.Umunhum, and then race back down. This event s..

The Rocky Ridge Trail Half Marathon is set to take place on September 20, 2025, at the scenic Las Trampas Wilderness in San Ramon, California. This challenging event features a half marathon, along with 10K and 5K options, catering to various skill levels. The half marathon is known for its rugged t..

The Dick Collins Firetrails will take place in Castro Valley from Saturday 27 September 2025 to Sunday 28 September 2025. You can run between 42 and 100 kilometers.

The Sunset & Cider Trail Races, taking place in Auburn, CA, on September 27, 2025, offers an exciting opportunity for trail runners of all levels. Participants can choose from three race distances: a challenging 50K, a scenic 13-mile half marathon, or a 5-mile run. The event features beautiful trail..

The 2025 San Jose Trail Challenge, hosted at Sanborn County Park, offers a thrilling experience for runners of all levels with distances of 10K, 21K, and 50K. Set against the stunning backdrop of the Santa Cruz Mountains, participants will navigate well-groomed yet challenging trails featuring signi..

The Pacifica Summit Run is an exciting running event taking place at San Pedro Valley State Park in Pacifica, CA. Participants can choose between a 10K and a Half Marathon, both offering stunning views of the Pacific Ocean coastline and challenging switchbacks. This event is designed for runners of..

The Auburn Half Marathon, scheduled for October 4, 2025, takes place in the historic town of Auburn, California, known as the "Endurance Capital of the World." This trail running event features a half marathon, 12K, and 5K, with courses that traverse the scenic Western States Trail and Auburn State..

The Star City San Bruno Mountain Half Marathon, organized by the Excelsior Running Club, is set for October 4, 2025. This scenic race features a challenging 13.1-mile course that is 93% on trails, with a total elevation gain of 2,400 feet, offering stunning views of the Pacific Ocean, Bay, and San F..

The Women's Headlands Half Marathon, taking place on October 4, 2025, is a scenic running event set in the stunning Marin Headlands, starting and finishing at Rodeo Beach. This annual race features a challenging half marathon distance of 12.6 miles with an elevation gain of 2,494 feet, as well as a..

The Reservoir Dogs Trail Run, taking place in Orinda, CA, offers a unique opportunity to traverse the scenic trails around Briones Reservoir, typically restricted to permit-only access. Participants can choose from three distances: 10K, Half Marathon, and 35K, all featuring beautiful rolling hills a..

The Mile Madness Endurance Run is an exciting endurance event taking place from October 10-13, 2025, at the Sunset Whitney Recreation Area in Rocklin, CA. This unique race features a 1.05-mile loop course, primarily on dirt trails, allowing participants to choose from various timed challenges, inclu..

The Ruth Anderson Memorial Endurance Run is a prestigious running event held annually in San Francisco, California, since 1986. This endurance race features multiple distances, including 50 miles, 100 kilometers, and 50 kilometers, attracting runners of various skill levels. The course consists of a..

The Mt. Umunhum Trail Conquest-Fall is an exciting running event taking place at Almaden Quicksilver Park in San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 30K, Half Marathon, 7 Miler, and 5K.The race features scenic routes that lead into the Sierra Az..