Trail Running calendar near Fairfield 2025-2026

Run rugged single track trails above Folsom Lake near Pilot Hill, CA, enjoying stony paths and sweeping water views. Options from a 5K to a 36 Miler make this a great day for trail runners of many paces and goals.

Run Marin Headlands trails, cross the Golden Gate Bridge and finish near San Francisco at the Golden Gate Trail Classic by Spartan Trail. Multiple distances across two days wrap up the Spartan Trail season.

Celebrate Thanksgiving at the Zoom Turkey Trot in San Jose at Hellyer Park with a USATF certified half, 10K, 5K and kids runs, plus t shirts and finisher medals. Flat, fast courses and stocked aid stations welcome all abilities.

Run off your Thanksgiving with the Wild Turkey trail run at Beals Point, Granite Bay, benefiting Folsom's Hope. Choose a stroller friendly 5K, a 10K or a free kids 1K and enjoy a new doubletrack stretch plus post race music and refreshments..

Celebrate Thanksgiving at the Moraga Turkey Trot, a friendly 5K or 1.5 mile run or walk on the Moraga Country Club cart path. Advance registration is required, proceeds benefit the food bank and participants get a tee, bib and prize chances..

Celebrate Thanksgiving weekend at Quarry Turkey in Fremont with a mostly flat half marathon, 10K, 5K and kids races. Walkers welcome, virtual options available, proceeds support the local food bank, and you can earn a Double Turkey connecto..

Run Krampus Cross Country in San Francisco live on Dec 7 or virtually Dec 5 to 8 with 5K 10K and the Naughty Nine Miler. All entrants get a wooden woodallion a Krampus tee and a beer sampler stein plus a brewfest on Dec 5.

Choose distances from a kids 50 yard dash to a full marathon as you run scenic Quarry Lakes and the Alameda Creek Trail in Fremont. Enjoy stocked aid stations, finisher medals and pre registered shirts with park entry included.

Tackle scenic singletrack and dirt at Calero County Park in the Calero Trail Run Winter, with distances from a kids mile to a 50K. Expect rolling hills, oak vistas, aid stations, a finishers medal and race day registration.

Peacock Gap Trail Run offers three scenic trail distances through China Camp and Harry Barbier parks near San Rafael. Expect technical singletrack, big views and well stocked aid stations; bring your own bottle or reusable cup for this cupl..

Run the iconic Hunter S. Thompson Fear & Loathing in San Francisco on December 7, a free grassroots single loop that winds past city landmarks and finishes at Twin Peaks. Choose 50 mile or 50K distances and help support Shoes For Runners.

Run a scenic point to point trail half marathon along Folsom Lake, mostly on single track through oak lined sections and rolling hills with lake and Sierra views. Race day bib pick up and shuttle service back to the start keep logistics sim..

Summit Rock on December 13 at Sanborn County Park features 5K, 10K and half marathon trail races through redwood groves and scenic mountain climbs. Walkers, hikers and remote runners are welcome; the half marathon includes a Hiker Division.

Run a scenic, challenging loop around Angel Island with sweeping views of the Golden Gate, Alcatraz and San Francisco. Choose the half marathon or 10K and ride the chartered ferry to this intimate 400 runner event.

Tackle epic trails in Cool, California on Dec 13 with a 50K or Half Marathon, both hiker and back of the pack friendly. Limited to 200 runners, enjoy big climbs, live tracking, and a finisher shirt and medallion for all.

Join Placerville's Holiday Jingle & Mingle Run for a festive outing on the scenic El Dorado Trail with distances for every runner from kids to half marathon. Finishers earn a commemorative medal and the event welcomes families rain or shine..

Woodside Ramble on December 20, 2025 winds through Huddart and Wunderlich parks near Woodside, CA, mixing scenic singletrack and fire roads. Multiple distances from 10K to 50K welcome trail runners in a capped, festive field.

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.

Start the year on scenic Lake Chabot trails with Brazen New Year's Day, offering half marathon, 10K, 5K and virtual options with timed results and free photos. Celebrate challenging trail miles and earn a commemorative medal.

Kick off the New Year on the trails at Auburn Resolution Run in Overlook Park on January 1, 2026. Choose 5k, 10k, 10 mile or run virtually and bring home a 2026 finisher medal.