Trail Running calendar near Fullerton 2026-2027

Run a 5K through the unique setting of an active rock quarry in Rialto. The course offers views of massive machinery and limestone terrain. All proceeds benefit local school STEM programs.

Join a free, social trail run in Newport Coast's wilderness parks. The non-competitive route changes each time, with this session covering about 6.5 miles. Stick around afterwards for snacks and a raffle.

This iconic trail running weekend on Catalina Island features California's official off-road marathon championship. Choose from a marathon, 10K, 5K, or a kids run, all set against a backdrop of ocean views and conservancy trails. The 2026 e..

The Singletrack Stampede is a 22k and 10k trail run through the scenic Las Virgenes Canyon near Calabasas. Runners navigate a cross-country course with switchbacks, creek crossings, and expansive views. The event includes a finisher medal,..

Explore the hills of Valencia on March 21, 2026, with a choice of 10K, half marathon, or 50K ultra trail distances. The course features single-track trails, challenging climbs, and panoramic ridge views. This cupless event provides a shirt,..

Explore the trails of Whiting Ranch Wilderness Park in Orange County. Choose from four distances, from a 6k to a 30k, on courses with views through oak woodlands. The event is well-supported and offers participant gear.

The inaugural Hill Canyon Trail Trot 5K is a scenic trail run along creek paths in Camarillo. The event features a 5K race and a Kiddie K for children, with all proceeds supporting the Stepping Stones Riding Program.

A loop-based trail endurance event in Fallbrook, CA on March 21, 2026 offering 12 hour solo, 12 hour team, and 6 hour solo formats. Each 4 mile loop gains about 1,300 feet and a stocked aid station supports every lap.

The Coast to Crest offers a flat and fast 10K and 5K on hard-packed trails in Del Mar. Runners enjoy spectacular lagoon views and a downhill finish. It's the final championship qualifier for the series.

The Griffith Park Trail Marathon will take place in Los Angeles on Saturday 28 March 2026. You can run between 10 and 50 miles.

Tackle the trails in the Cleveland National Forest near Silverado with the Billy Goat Mountain Climb. Choose from three distances, all featuring significant elevation gain, including a local favorite 17-mile loop. Aid stations and shuttles..

This trail run or hike in Laguna Beach's El Moro Canyon offers a 6K or 10-mile course with ocean views. Participants receive a shirt, medal, and photos. Parking at the state park costs $15.

Hop into spring with the Hoppy Easter runs at Griffith Park. Choose from four distances on a scenic dirt trail course, from a 5k to a half marathon. Every finisher gets a custom medal, and the event includes free photos and a friendly atmos..

The Nature Made Great Race returns for its 41st year in Agoura Hills with multiple distances, including a scenic trail half marathon. Runners receive a technical shirt, finisher medal, and enjoy a post-race party. The event features USATF-c..

The Bedrock Valley Trail Runs offers a weekend of trail running and gravel biking at Diamond Valley Lake. Choose from a marathon, half marathon, 15k, 10k, or 5k on Saturday, followed by gravel bike rides on Sunday. It's a cupless event with..

Step back in time for a totally tubular run in Huntington Beach. This 80s themed event features a 5K, 10K, and Half Marathon on a flat, scenic oceanfront course. After the race, enjoy a costume contest, a beach party with a live DJ, and an..

Leona Divide offers five trail distances from 30K to 100 miles in Lake Hughes, California. The event serves as a qualifier for Western States and awards tickets for the Angeles Crest 100. Registration closes on April 1.

Trail races on the Soboba Indian Reservation support Noli Indian School. Choose from marathon, half marathon, 5k, or a kids' 3k walk/run. The event features Native and Open divisions, with proceeds funding a student scholarship.

Race through the ocean-view trails of Point Mugu State Park on a 21k or 10k course. Enjoy a finisher medal, breakfast tacos, and a post-race beer garden. It's part of a six-race half-marathon series with special awards.

Machete Trail Madness features 10K, 50K, and 100K races on looped courses around Lake Perris. The event includes free lakeside camping for participants and their families. It offers long cut-off times and a community-focused, multi-lap race..