Trail Running calendar near Irvine 2026-2027

Trail running event in Valencia California on 03/20/2027 offering 10K, Half Marathon, and 50K Ultra across hills, ridgelines, and canyon terrain with views of the Santa Clarita Valley.

An outdoor obstacle event at Lake Elsinore Raceway on March 20, 2027, offering multiple distances including 5 to 8 km and 15 plus km, Infinity laps, named obstacles, finisher medal, shirt, headband, and a finisher drink.

Coast to Crest in Del Mar features out-and-back 10K and 5K courses on hard-packed dirt with minimal elevation and a downhill finish. Wide lagoon views and possible osprey sightings accompany a fast, groomed trail that doubles as a champions..

Multi distance trail running and gravel bike events at Diamond Valley Lake in Hemet, California. Routes include lakeside loops, out and back courses, a stroller 5K and a kids fun run.

A weekend of Spartan obstacle races at Pala Fox Raceway in Pala, CA on Apr 10-11, 2027, featuring a 5 km Sprint with 20 obstacles, a 10 km Super with 25 obstacles, a kids race and spectator options.

The Natro@Noli Indian School will take place in San Jacinto on Saturday 10 April 2027. You can run between 5 and 42 kilometers.

The Nature Made Great Race: Half Marathon will take place in Agoura Hills on Saturday 10 April 2027. You can run between 5 and 21 kilometers.

Leona Divide is a trail running event near Lake Hughes, California, offering distances from 30K to 100 miles. The 100 mile and 100K are Western States qualifiers and the 50 Mile awards AC100 Sterling Silver Tickets.

A multi-format trail event in Placerita Canyon offering looped courses, multiple distances and time categories, team relays, camping, cupless aid stations, chip timing, and finisher swag on May 1, 2027 in East Walker Ranch Open Space.

A scenic 5k at Whittier Narrows Park with live mariachi and banda music, water stations, chip timing, and a post-race festival featuring tacos, a beer for 21+, a medal, and a t-shirt.

A memorial, self-supported marathon in San Diego with a counter-clockwise course, no event aid or official timing, a seven-hour cutoff, and a Garmin/GPX route that passes Torrey Pine North amenities.

Trail event at Crystal Cove State Park on May 8, 2027 with 50K, 25K and 5K routes on dirt roads and single track, ocean views, participant shirt and finisher mug, supporting the John Wayne Cancer Foundation.

A high altitude Spartan weekend at Big Bear Mountain Resort featuring Sprint, Super, Beast and Kids races, plus a Trifecta option to complete all three main distances in one weekend.

Trail event in O'Neill Park, Trabuco Canyon offering multiple distances from 10k to 50k on May 15, 2027. Registration opens Dec 1, 2026 and entries are nonrefundable with rollovers allowed for cancellations due to weather or fire.

A trail 10K at Big Bear Mountain Resort on singletrack through high altitude pine forest, with technical climbs, descents and views of the Southern Sierra. The weekend also includes Spartan obstacle races and spectator options.

A fully supported trail event in the Angeles National Forest featuring a 50k and a half marathon on technical singletrack, high elevation terrain, aid stations, free race photos and a finish festival with food and massage.

The Griffith Park Trail Marathon Relay & 8K will take place in Los Angeles on Sunday 6 June 2027. You can run between 8 and 42 kilometers.