Brea
Trail Running Calendar near Brea 2026-2027
Explore the top trail runs near Brea for 2026-2027! We've gathered 49 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
Cross country invitational on September 5, 2026 at John Glenn High School, co hosted by Cerritos and John Glenn, with in person and virtual open races.
The 61st Mt Baldy Run to the Top on September 7, 2026 is a fundraising mountain trail race in the Angeles National Forest covering about 7 miles with 4,000 feet of ascent to the 10,064 foot summit, with proceeds aiding local services.
A Stadion obstacle race at Angel Stadium of Anaheim on September 12, 2026, featuring a 5 km course with 20 obstacles plus a kids race and spectator options.
Evening trail relay and 5K at Griffith Park featuring team relays, a 1K kid run, live music, golden hour photos, medals, and awards.
Free social trail run in Newport Coast at El Moro and Laguna Coast Wilderness Park about 6.5 miles with 1,165 feet of elevation gain.
Experience a scenic multisport event at Crystal Cove State Beach featuring swim legs in the Pacific Ocean and a closed bike course on the Pacific Coast Highway. Choose from triathlon duathlon aquabike or trail run options.
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.