Trail Running calendar near El Sobrante 2025-2026

The ZombieRunner Quarry Lakes event is a running competition held at the scenic Quarry Lakes Regional Recreation Area in Fremont, California. Participants can choose from various distances, including a 5K, 10K, Half Marathon, 30K, and Marathon, along with youth categories and a free Kid's Run. The c..

The Calero Trail Run - Winter is an exciting trail running event held at Calero County Park in San Jose, CA. Participants can choose from various distances, including 50K, Trail Marathon, 25K, Half Marathon, 15K, 10K, 5K, and a Kids Run. The course features scenic single tracks, hills, and dirt path..

The Hunter S. Thompson Fear & Loathing event is a renowned ultra-running race held annually in San Francisco, CA, celebrating its 41st edition in December 2025. Participants can choose between a 50K and a 50-mile course, with no entry fee required.The race features a mix of city streets and parallel..

The Summit Rock Half Marathon, along with 10K and 5K events, takes place in the scenic Sanborn County Park, nestled in the Santa Cruz Mountains near Saratoga, California. Participants can enjoy running through beautiful redwood groves and along single-track trails, with options for both experienced..

The Brazen New Year's Day event in 2026 offers participants a choice of three scenic running distances: a half marathon, 10K, and 5K, set against the beautiful backdrop of Lake Chabot in Castro Valley, California. This invigorating race takes place on January 1st, welcoming runners to kick off the n..

The Hacienda Hills Trail Run - Winter is an exciting trail running event set in the scenic Almaden Quicksilver County Park near San Jose, California. Scheduled for January 3, 2026, participants can choose from nine different race distances, including a Kids Run, 5K, 10K, half marathon, marathon, and..

The Mt. Umunhum Trail Conquest - Winter is an exciting running event taking place at Almaden Quicksilver County Park in San Jose, CA. Participants can choose from various distances, including a 50K, Marathon, 30K, Half Marathon, 7 Miler, 5K, and a Kids Run.The course features scenic trails that lead..