Trail Running Calendar California 2026-2027

Run the scenic Sean O'Brien Trail Races in Calabasas on January 31, 2026, with distances for every trail runner. The 100K is a Western States 100 qualifier, and options from 30K to 50 Miler promise challenge and community.

Races at Coyote Hills Regional Park in Fremont include a half marathon, 10K and 5K along mixed dirt, paved and boardwalk trails by the bay. Courses have minimal climbing and provide marsh and shoreline views.

The 48th Jed Smith Ultra Classic on January 31, 2026 in Sacramento features USATF certified 4.85 mile loops along the American River Parkway with distances from half marathon to 50 miles, technical shirts, wooden finisher medals, and two ai..

Hit singletrack trails around scenic Hensley Lake with a challenging 10k trail run and multiple mountain bike races featuring technical rock gardens and varied climbs. Participants receive custom event shirts and medals for the main 10k and..

Test your legs on scenic Sierra Azul trails at Mt Umunhum Trail Conquest Winter, with distances from a kids run to 50K and routes that summit Mt Umunhum and Bald Mountain. Finishers earn commemorative medals and aid stations keep you fueled..

The Boney Mountain Trail Run will take place in Newbury Park on Saturday 7 February 2026. You can run between 7 and 21 kilometers.

Trail runs at Granite Beach beside Folsom Lake offering 10 mile and 5K courses with multiple aid stations, finisher medals, and age group and overall awards. Pre-sale shirts are available.

Trail races at Fort Ord National Monument offering 10K, 25K and 50K routes with marked trails, aid stations, cupless service, live timing, and awards for finishers.

A 50.7-mile trail ultramarathon at Fort Ord National Monument near Monterey, CA, run as a 35-mile plus 15-mile loop with varied terrain, staffed aid stations, drop-bag access, cupless support, and live timing.

Scenic Boney Mountain trail run in Thousand Oaks offers challenging half marathon or 7k routes with creek crossings, single track climbs and ocean views. Enjoy race shirts, medals, free photos, vegan breakfast and a $500 course bonus.

Run the stunning coastal trails around Rodeo Beach at the Golden Gate Trail Run, with distances from 8K to 50K to suit all levels. Expect rugged singletrack, stocked aid stations, generous finisher medals, and unforgettable views.

Join the JW House Hope Run in Los Gatos for scenic 5K and 10K routes around Vasona Lake, perfect for runners, walkers and strollers. Proceeds support JW House to help keep families together during medical emergencies.

A trail event in the Red Hills Recreation Area near Jamestown, California on February 7, 2026, offering two tenish distances. Routes run on technical terrain with water crossings, mud, and a single aid station.

Tackle snowy trails at the Racing Gnome Snowshoe Race in Truckee on February 8, 2026, with 5K and 10K options for all paces. Hosted by Donner Party Mountain Runners, the friendly event offers limited loaner snowshoes and course previews.

A cross country event in Fresno featuring an 8K race, a 2 mile walk and kids races. The off-road course includes water pits, muddy sections, hills and hay obstacles, and 8K age group awards are offered.

Run scenic, rolling trails through Escondido's Daley Ranch with a rugged 50K two loop challenge or a single loop half marathon. Both races start and finish at Dixon Lake with stocked aid stations and SoCal Ultra Series points.

Scenic races at San Leandro Marina on February 14, 2026, with half marathon, 10K, 5K and a remote runner option. The mostly flat bayside course stays close to the water and offers views of San Francisco and the Bay.

Celebrate Valentine’s Day at Farmer Bob's Live, Love, Run 5K winding through orange orchards on a picturesque citrus ranch in Ivanhoe. Chip timed with a custom finisher medal, fresh picked oranges and a lively DJ celebration.

Celebrate the Lunar New Year with a bold, self supported trail loop in San Diego. This unmarked 51 mile course around PQ Canyon demands navigation and self reliance, rewarding runners with scenic trails and a true backcountry challenge.

Celebrate Valentine’s Day with a scenic trail run in Griffith Park Los Angeles. Choose from 5k, 10k, 15k or half marathon loops and enjoy aid stations, a finisher medal, free photos and post race snacks.