Brea
Trail Running Calendar near Brea 2026-2027
Explore the top trail runs near Brea for 2026-2027! We've gathered 45 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
At U.S. Bank Tower participants climb 75 floors or take a self-guided urban hike to support Ketchum Downtown YMCA programs, then gather for a block party with music and food.
A chip timed 5K trail run and walk at Ascot Hills Park with city views, finisher shirt and medal, live results and community activities.
Trail ultras from the Mt. Wilson summit offering 25K and 50K routes on technical single track with stocked aid stations and awards for top finishers.
October 2026
9.1 miles to the Mt San Antonio summit with 3,926 ft vertical gain on steep, exposed mountain trails; course capped at 500 entrants in Angeles National Forest.
A 3 miles open race on the Sunset Conference cross country course at Huntington Beach Central Park on October 3, 2026, featuring electronic timing and age group medals.
A 5K on shaded eucalyptus horse trails at Ernie Howlett Park in Palos Verdes Peninsula on October 4, 2026. In person and virtual options are available, plus a fundraising route that waives the fee with at least $100 raised for Strides in Recovery.
A 5K event in Los Angeles on October 25, 2026 to raise funds for dyslexia education, offered both in-person and virtual with a flat one loop course and free parking.
A 3.6 mile trail loop at Coastal Peak Park with about 585 ft gain per loop through coastal sage scrub and riparian canyons; part of the Southern California UltraRunner Grand Prix Series.
November 2026
Experience California's premiere trail race with distances from 10k to a full marathon through the scenic Black Star Canyon and Cleveland National Forest.
Night trail races of 5K and 10K at Marvin Braude Mulholland Gateway Park in Tarzana, with required headlamps, marked courses, aid stations, and on-course medical support.
Sandy Sprint California is a charity 5K run/walk at Griffith Park on November 8, 2026, hosted by the Sandy Rollman Ovarian Cancer Foundation to raise funds for research.
Charity run in Griffith Park on 11/14/2026 with pet and human divisions; proceeds support Run for Paws, which helps dogs in need.
Fixed-time 3, 6, and 8 hour trail runs on an approximately 2.75-mile loop at O'Neill Regional Park in Trabuco Canyon with a main aid station and about 500 feet gain per lap.
Trailsgiving at Elysian Park on November 14, 2026 offers 5k, 10k, 15k and half marathon trail routes on hard-packed dirt with marked out and back loops.