Trail Running Calendar California 2025-2026

Choose a 10k, 25k, or 50k along scenic trails beside Millerton Lake and the San Joaquin River in Friant, CA. Enjoy lakeside views, aid stations and finisher swag as you tackle a variety of distances on December 6, 2025.

Join the San Clemente Santa Run on December 6, 2025 for a festive 5K or fun run along the beach, starting at the Pier Bowl. Celebrate with music, an auction and dinner while supporting Lily's Lighthouse and epilepsy research.

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.

Tackle scenic single track trails at Elfin Forest in the Keepin' It Rural 5K and 10K, where runners get chip timing and a festive post race party. Enjoy a tech shirt, finisher medallion and a beer while supporting Escondido Creek Conservanc..

Celebrate the SoCalTrail season finale at Crystal Cove State Park in Laguna Beach with scenic coastal trails and challenging climbs on 15k and 6k courses. Family friendly 1k for kids, cash prizes for 15k podiums, finisher medal, breakfast a..

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..

Run through redwood groves on winding single track trails in the Santa Cruz Mountains at Summit Rock, a scenic trail race just outside Silicon Valley. Half marathon, 10K and 5K distances welcome walkers and hikers with a separate hiker star..

Tackle scenic trails at Dixon Lake on December 13, 2025 with 10 mile, 10K or 5K options. The challenging courses climb to Standley Peak for sweeping summit views and a limited field keeps the experience intimate.

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.

Join Doomsday in Cool, CA on December 13 for a scenic but savage trail challenge with 50K and Half Marathon options. Limited to 200 runners, hikers welcome and trekking poles allowed, with live tracking and finisher swag.

Run under the stars on fully marked fire road courses at Mulholland Gateway Park in Tarzana, with 5K and 10K night options. Bring a working headlamp, enjoy aid stations, and collect a finisher medal and shirt.

Celebrate Hanukkah with the Hanukkah 8 Krazy Kilometers at Panorama Vista Preserve in Bakersfield. Run an 8K or 2K Latke Loop in person or virtually and enjoy a custom finisher medal, Hanukkah swag, and festive community spirit.

Celebrate the season with the Holiday Fun Run at Griffith Park, offering 5k, 10k, 15k and half marathon routes on scenic dirt horse trails and grassy starts. Enjoy on course aid, a finisher medal, free photos and post race snacks.

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..

Join Paramount Ranch Trail Runs on December 20, 2025 for scenic trail races through the historic Paramount Ranch in Agoura Hills. Choose from 10K up to 50K and enjoy varied terrain, stunning views and a community race day organized by KHrac..

Run scenic trails at Huddart County Park on Dec 20, 2025 with distances from 10K to 50K to suit every trail runner. Marked courses and stocked aid stations help on technical singletrack; bring a reusable cup for the cupless race.

Get into the holiday spirit at Run for a Claus in Irvine on Dec 20, 2025, with 1 mile and 5K options plus virtual entries. Enjoy festive music, cookies, a Santa hat, finisher medal and support local charities and kids.

Tackle Sycamore Canyon's rugged singletrack at the Dirty December Trail Run on Dec 21, 2025, with marathon, half, 10K and a repeating hill climb loop. Expect big climbs, festive costumes, a tech shirt and finisher awards.

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.