Trail Running Calendar California 2025-2026

Celebrate Thanksgiving with a flat, scenic course at Quarry Lakes in Fremont offering a half marathon, 10K, 5K and a Little Turkeys kids dash. Costume friendly, walkers welcome, and donations support the Alameda County Community Food Bank.

Run a scenic one mile loop at Washburn Ranch in Hemet with 100 mile, 24 hour and relay formats, live tracking, on site camping and close aid. Buckles await solo runners who complete 100 miles within the 31 hour window.

Join the Waffle Run in Clovis on Nov 29 for competitive and fun 5K, 2 mile and virtual options for all ages. Proceeds benefit Poverello House and many entries include Huckleberry's waffle breakfast coupons.

Rugged single track and dirt trails with big climbs await at the ninth annual Black Mountain Turkey Burner in San Diego. Limited to 300 runners, the trail festival offers a half marathon, 10K, 5K and kids dash and is an ERS qualifier.

Island View Endurance Run in Goleta, CA offers distances from 12 km to 100 mile across scenic coastal trails with big climbing. Supportive aid stations and buckle awards for 100 mile finishers make this a memorable ultrarunning test.

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.

The Fremont Canyon 28k Trail Run is an exciting running event taking place in Irvine Regional Park, Orange, California. Scheduled for December 6, 2025, this challenging 28k (17.5 miles) course features fire roads with an elevation gain and..

Run the 37th annual Death Valley Trail through dramatic desert scenery and near North America's lowest point. Choose marathon, half marathon, or 10K on a quiet dirt road with a limit of 200 runners for an intimate challenge.

Run the 38th High Desert Ultra in Ridgecrest, California on December 6, 2025, with 50K, 30K, and a new 10K through scenic desert loops. Proceeds support youth running and community charities and all finishers get a handmade ceramic medal.

Run ZombieRunner Quarry Lakes in Fremont on December 6 for scenic, mostly flat courses along Alameda Creek with distances from 5K to marathon. Stocked aid stations, custom finisher medals, and timed results make it a fun day for all.

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.

Tackle a scenic 50 mile point to point ultramarathon through Cuyamaca Rancho State Park, climbing Stonewall Peak and dropping to the desert finish near Julian. Family and crew friendly with camping, showers and a post race meal to celebrate..

Challenge yourself on rugged coastal trails at the Ray Miller 50/50 at Point Mugu State Park in Malibu on December 6, 2025. With 50 mile, 50K and 30K options, the 2025 race is sold out and the waitlist is closed.

Tackle scenic trails at China Camp State Park in San Rafael with 30K, half marathon, or 10K options on December 6, 2025. Technical single track and fire roads, chip timing, and cupless aid stations make this a gritty, well supported winter..

Run scenic trails along Millerton Lake and the San Joaquin River with 10k, 25k or 50k options on December 6 2025 in Friant CA. All finishers receive a medal and swag and top finishers earn awards for a memorable trail day.

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..

Join the Crystal Cove Trail Run on Saturday, December 13, 2025 in Laguna Beach with 15K, 6K and Kids 1K courses over coastal ridges and single track to a beach finish. All finishers get a medal and shirt and the 15K awards a $2,000 prize pu..

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..