Trail Running Calendar California 2025-2026

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.

Event details Paramount Ranch Trail Runs is a trail running event scheduled for December 20, 2025, at Paramount Ranch in Agoura Hills, California. The event is described as a return to the local trails after recent years. The National Park..

Run scenic single track through Huddart County Park redwoods at the Woodside Ramble on Dec 20, 2025. Choose 10K, half marathon, 35K or 50K for a challenging trail run with aid stations and chip timing.

Take on the Dirty December Trail Run at Sycamore Canyon on Dec 21, 2025 with marathon, half, 10K and a 6 hour hill climb over rugged trails and steep climbs. Finishers get a tech shirt and prizes and there is a lively costume contest.

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.

Kick off the new year on trails at Overlook Park in Auburn with the Auburn Resolution Run on January 1, 2026. Choose from 5K, 10K, 10 mile or run virtually and earn a 2026 finisher medal.

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.

Event overview The Lost Coast 55K is a January backcountry running event near Whitethorn, CA, with a course length of 55K (about 34.3 miles) and roughly 6,500 feet of elevation gain. The start and finish are at the Horse Creek Mountain trai..

Event overview The Hacienda Hills Trail Run - Winter takes place on Saturday, January 3, 2026, outside San Jose, California at Almaden Quicksilver County Park, Hacienda Entrance. The event offers multiple trail running distances with increa..

Event details Ring in the New Year is a running event at Whittier Narrows Recreation Area on Sunday, January 4, 2026. The course uses marked out-and-back loops on the beach path and is an open course shared with other pedestrians, runners,..

Del Dios Trail Race Del Dios Trail Race, called the "Race of the Gods", is the 11th annual edition held at Lake Hodges in Escondido, California. The event takes place in January 2026. It is listed as a Championship Qualifier. The..

Hope in Every Step 5K — event details Hope in Every Step 5K takes place on January 10, 2026 in Modesto, California. The event is a 5K run/walk on a 3.1-mile course using the trails at East La Loma Park, located at 2001 Edgebrook Drive, Mode..

Enjoy scenic shore side trail runs at Granite Beach with two distances to choose from and stunning Folsom Lake views. Finish with a locally brewed IPA for 21 and over, a custom IPA Trail Run glass and a hearty post race meal.

Run the scenic Western States trail through Auburn's American River canyons, crossing the iconic No Hands Bridge and tackling the K2 and Overlook climbs. Multiple distances from 8K to ultra 50K offer challenging single track and big views.

Experience scenic San Pasqual Valley trails at the San Diego 50 & Trail Runs, with distances from a 50 mile challenge to family friendly youth miles. Finishers earn a handcrafted wooden medal and tri blend shirt while enjoying aid stations..

Take on scenic, well marked trails at Huddart Park with distances from 8K to 50K plus a free kids dash. Stocked aid stations, custom finisher medals and challenging climbs make this a rewarding trail day for all abilities.

Run rugged, scenic trails around Crystal Springs in Woodside with distances from an 8K to an adventurous 50K. Pre registered runners get shirts, all finishers earn custom medals and fully stocked aid stations keep you fueled.

Run a scenic trail 10K or 5K along the shores of Folsom Lake at Granite Beach on January 24, 2026. Well marked and supported, the course features aid stations and beautiful lake views to motivate runners of every level.

Run scenic single track along Folsom Lake with routes from a mile to an adventurous 50K through rolling hills and some technical sections. Register online through race morning and enjoy aid stations, finishers medals and on site bib pick up..

Tackle scenic, technical coastal trails at the Pacifica Foothills Trail Run in San Pedro Valley Park on January 24, 2026, with 30K, half marathon and 10K distances. Races are chip timed with cupless aid stations so bring a bottle or reusabl..