Trail Running calendar near Pacifica 2025-2026

Event overview ZombieRunner Quarry Lakes takes place on Saturday, December 6, 2025, in Fremont, CA at Quarry Lakes Regional Recreation Area (Ensenada Pavilion). The event includes multiple distance options: 5K 10K Half Marathon 30K Maratho..

Explore scenic, hilly single track at Calero County Park in San Jose with distances from a kids run through 50K, on December 6, 2025. Enjoy challenging dirt trails, marked courses, and a commemorative medal for all finishers.

Peacock Gap Trail Run sends runners over scenic single track in China Camp State Park with 10K, half and 30K choices. Expect technical trails, great views and chip timed results. This is a cupless event so bring a reusable cup.

Event overview The Hunter S. Thompson Fear & Loathing is an annual urban ultrarun in San Francisco, held as the 41st running on December 7, 2025. The event is presented by Haight Ashbury Ultra Society, Zombie Runners, and Fat Ass Runner..

Event details The Hark the Herald race returns for its 37th annual running on Saturday, December 13, 2025, at Angel Island State Park near Belvedere Tiburon, CA. The event is limited to 400 participants. Distances offered: Half Marathon -..

Run scenic single track trails through redwood and pine groves at Summit Rock in Sanborn Regional Park near Saratoga, CA. Choose 5K, 10K or half marathon, enjoy park peak views, walk if needed, and take home a custom finisher medal.

Run the Woodside Ramble on December 20, 2025 at Huddart County Park, choosing from 10K up to 50K on scenic, marked trails with full aid stations and chip timing. Limited to 400 runners for an intimate, challenging race day.

Ring out the year with Almost New Year's Eve at scenic Lake Chabot in Castro Valley on 12/27/25. Trail routes for runners, walkers and hikers include 5K, 10K and half marathon distances with free post race photos.

Ring in the New Year at scenic Lake Chabot with Brazen Racing, choosing a half marathon, 10K, 5K or remote option. Trail climbs, free photos by volunteers and a hiker start make for a memorable day.

Run the hills of Almaden Quicksilver Park with distances from a kids run and 1 Mile to a bold 50K. Marked trails, aid stations, drop bags for ultras and medals for all finishers make it a scenic, well supported trail day.

Event overview The Crystal Springs Trail Run takes place on Sunday, January 18, 2026, at Huddart Park (Werder Shelter), 1100 Kings Mountain Road, Woodside, CA 94062. Distances offered: 8K Half Marathon 35K Marathon 50K Kid's Run (6 years a..

Crystal Springs Trail Run : January 18, 2026 The Crystal Springs Trail Run takes place at Huddart Park (Werder Shelter), 1100 Kings Mountain Road, Woodside, CA. The event includes the following distances: 8K Half Marathon 35K Marathon 50K..

Run rugged coastal trails at Pacifica Foothills Trail Run in San Pedro Valley Park on Jan 24, 2026 with 30K, half marathon and 10K. Chip timed, cupless race with scenic Montara Mountain climbs and stocked aid stations.

Run scenic trails at Coyote Hills Regional Park in Fremont on Jan 31, 2026, with half marathon, 10K, 5K and remote options. Enjoy marsh and bay views, boardwalks and stocked aid stations plus downloadable GPX files.

Hit the coastal trails at Rodeo Beach in Sausalito on February 7, 2026 with options from a kids dash to a rugged 50K. Enjoy scenic single track, full aid stations, finisher medals and a welcoming finish line atmosphere.

Run a scenic and rugged 50.7 mile trail ultramarathon around Fort Ord and Laguna Seca near Monterey, CA, with about 7,080 feet of climbing over two big loops. Expect aid stations, live timing and a custom finisher hat and medal.

Run scenic coastal trails at Fort Ord and Laguna Seca with 10K, 25K and 50K options featuring rolling dunes, dirt tracks and late climbs. Well stocked aid stations, live tracking and finisher medals for a quintessential California trail day..

Take on the Mt. Umunhum Trail Conquest in Almaden Quicksilver Park, offering distances from a kids run to a 50K with scenic climbs and all courses starting and finishing at the Hacienda Entrance. Finishers earn a commemorative medal.

Join Bay Breeze at San Leandro Marina Park on Feb 14, 2026 for a scenic bayside half marathon, 10K or 5K. All finishers receive custom medals and shirts and the race offers chip timing, aid stations and a remote runner option.

Enjoy challenging coastal mountain trails at the Montara Mountain Trail Run in Pacifica, with distances from 10K to 50K plus a Kid's Run. Scenic single track, stocked aid stations, and great trail views make it a must for trail lovers.