Trail Running calendar near Green Valley Lake 2026-2027

A mountain 5K, 10K and half marathon around Green Valley Lake, CA, featuring mixed paved and dirt surfaces, multiple aid stations, chip timing, race awards, and proceeds benefiting The Children’s Forest.

Looped trail races at Thomas F. Riley Wilderness Park offering 5k through 30k and a 6 hour event on August 1, 2026; registration opens February 1.

A 5k trail run at Red Rock Wilderness near Silverado, CA featuring fire roads and single track, 300 feet of climbing, one aid station, a cupless policy, and no pets allowed.

A free community festival by UltraSignup in Los Angeles featuring a group trail run with 5K and 10K options, an expo with vendors, food, and a raffle. The event is held at A Snail's Pace Running Shop in Chino Hills.

This premier trail race ascends 7+ miles from 6,000 feet to the 10,064-foot summit of Mt. Baldy on Labor Day. It includes a shirt, a finisher medal, and four aid stations, with a required 3.5-mile hike back after the finish.

Run into the sunset at Griffith Park. Choose from a 10-mile team relay, a scenic 5K solo race, or a kids' run. The event promises marked trails, panoramic city views, and a lively finish line atmosphere.

This trail 5K takes place at Ascot Hills Park with views of the Hollywood Sign and Dodger Stadium. The chip-timed event benefits a local high school cadet program. A virtual race option is also available.

Take on the rugged 25K or 50K trail ultra at Mount Disappointment in the Angeles National Forest. The course starts at Mt. Wilson and features technical single track with significant elevation gain. Enjoy panoramic views on a fully marked r..

A seaside themed run in Long Beach offering 5K, 10K, half marathon and family distances with chip timing, free race photos, finish line pizza and a costume contest.

Traverse the San Gabriel mountains on this classic point-to-point 100-mile course. As one of the original five U.S. 100-milers, it features rugged climbs and a historic route. Finishers earn a custom engraved plaque and a distinctive belt b..

A set of trail races near Silverado, CA offering 50-mile, 50K and 30K courses on remote, technical 4x4 and single-track trails with significant elevation gain, aid stations, mandatory self-sufficiency, and cupless support.

A multi format running event on the Cahuilla Indian Reservation in Anza, California, featuring loop ultraruns, fixed time races, a half marathon and a Tribal Member 5k. Funds raised support the tribe youth and family programs; 100 mile fini..

Run among the iconic rock formations at Vasquez Rocks Natural Park in Aqua Dulce on October 17, 2026. SPACEROCK Trail Race features 5K, 10K, 15K and half marathon routes on scenic trails for runners of all abilities.

Experience scenic singletrack and natural terrain at Hahamongna Watershed Park in Pasadena with options for a trail half marathon, 10K, or 5K on Sunday, October 18, 2026. Perfect for trail runners seeking a challenging yet runnable course.

A trail running event at Caspers Wilderness Park on October 24, 2026, offering 10k, half marathon, 35k, marathon and 50k courses. Courses are described as marked and supported, with an athlete guide and past results available.

An 8-hour timed trail run on a 3.7 mile loop with about 600 feet of climb per loop at Wildwood Canyon State Park in Yucaipa on October 24, 2026. Aid stations and vendors are onsite and an after party is held at Hops and Spokes Brewery.

The Machete Muertos 200 is a multi-day ultramarathon at Lake Perris, featuring distances from 10 to 200 miles. The event offers a free campground and is themed around the Dia de Los Muertos celebration.

A trail event in Silverado, California, offering marathon, 25k, half, and 10K courses routed out of Black Star Canyon with significant elevation gain and multiple aid stations.

Run through the Santa Monica Mountains on Thanksgiving morning. Choose from a half marathon, 10k, or 5k on scenic fire roads and singletrack. The entry includes a shirt, medal, breakfast, and a post race beer garden.

A 28k trail run in Fremont Canyon at Irvine Regional Park featuring about 3800 feet of elevation change and four aid stations. The course runs on fire roads, is cupless, and participants are asked to carry personal hydration.