Trail Running calendar near Fairfield 2025-2026

The Zoom Turkey Trot is a Thanksgiving Day running event held at Hellyer County Park in San Jose, California. It offers multiple race distances including 5K, 10K, and a USATF-certified half marathon, with additional age-specific categories..

Celebrate Thanksgiving morning with the Wild Turkey trail run at Beals Point, featuring 5K and 10K races plus a free 1K kids run to benefit Folsom's Hope. Stroller friendly 5K and leashed dogs welcome, bring your own bottle and enjoy post r..

Run Quarry Turkey at Quarry Lakes for fast, mostly flat trails with distances from 5K to half marathon plus a free Little Turkeys kids run. Family friendly, costume friendly, free photos and donations support Alameda County Food Bank.

Quad Dipsea : November 29, 2025 The Quad Dipsea is a trail ultramarathon held in Mill Valley, California. It is the 42nd running and covers 28.4 miles with about 9,000 feet of total ascent. The course is an out-and-back from Old Mill Park t..

The Krampus Cross Country is a festive running event held in San Francisco, California, featuring live and virtual options. Participants can choose from three distances: a 5K, 10K, or the challenging Naughty Nine Miler. The live races start..

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 -..

Folsom Lake Point to Point Trail Half Marathon : December 13, 2025 The event is a Half Marathon held in El Dorado Hills, CA on December 13, 2025. The course is point-to-point and is primarily run on the Southside Trail alongside Folsom Lake..

Doomsday in Cool, CA on December 13, 2025 offers 50K and Half Marathon road and trail courses with big climbs and just 200 spots. Supported course with live tracking and hikers welcome for a bold end of year challenge.

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.

Join Placerville's Holiday Jingle and Mingle Run on December 20, 2025 for distances from a kids run to a half marathon along the scenic El Dorado Trail. Enjoy steady climbs, downhill returns, aid stations and finisher medals.

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.

The Auburn Resolution Run is a trail running event held at Overlook Park in Auburn, California. Scheduled for January 1, 2026, it offers multiple race distances including 5K, 10K, 10 miles, and a virtual run option for any distance. This ev..

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.

The IPA Beer Trail Runs, held at Granite Beach in Folsom Lake State Recreation Area, offer two scenic trail race options: a 5K and a 12K along well-marked single-track paths with beautiful lake views. The event combines challenge and fun, c..