Brea
Trail Running Calendar near Brea 2026-2027
Explore the top trail runs near Brea for 2026-2027! We've gathered 40 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
November 2026
Fixed-time trail runs on an approximately 2.75 mile loop in O'Neill Regional Park with 3, 6 and 8 hour options through wooded canyons and varied terrain.
Trailsgiving in Elysian Park offers 5k, 10k, 15k and a half marathon on marked out and back trail loops with on course aid and finisher medals.
Friendsgiving FUNdraiser run at Whittier Narrows on Nov 15, 2026 offering 5k, 10k, 15k and a half marathon with proceeds supporting API Forward Movement.
An obstacle and mud-focused 5K at Oak Canyon Park in Irvine on Nov 21, 2026, featuring mud pits, walls, ropes, a festival village, and packet pickup the day before.
A November trail event in Griffith Park, Los Angeles offering multiple distances including 50K and marathon, organized by Keira Henninger Events.
Thanksgiving morning trail races in Los Angeles with a half marathon, 10k and 5k through the Santa Monica Mountains, finishers' medals, aid stations and a beer garden.
December 2026
Trail races at Crystal Cove State Park on December 12, 2026, featuring a prize-backed 15K, a 6K and a Kids 1K with shirts, medals, aid stations and post-race amenities.
January 2027
Trail run and hike events in Griffith Park on January 24 2027, featuring 8M, 8K, 5K and a 2.2K kids run with marked courses, aid stations, participant shirts and finisher medals.
Trail events in Griffith Park on January 24, 2027, including an 8 mile out and back to the Hollywood Sign viewpoint, an 8K, a 5K, and a 2.2K kids loop with aid stations, timing, shirts, and finisher medals.
February 2027
A multi-distance event in Griffith Park with a flat, shaded 5K, a half marathon across major park trails including a final peak reward, an on-site expo and food trucks, and varied registration fees by race.
Multiple distance trail races at Griffith Park on February 14, 2027 featuring dirt trail loops, an aid station, finisher medals, and group discounts.
March 2027
A waterfront running festival in Long Beach on March 20, 2027 featuring races from 5k to a half marathon, a beer mile with four included beers and a nonprofit beer tasting alongside a one mile Beer Stroll.
Two days of trail runs and road and river bike rides at Griffith Park supporting Streets Are For Everyone's road safety work, with distances from 1K and family rides up to a half marathon and 100 mile ride, based at the Autry Museum.
May 2027
A 5k through Whittier Narrows Park with tacos, beer for 21+, live mariachi and a post race festival; packet pickup occurs the day before and a 2 hour time limit applies.
Trail runs of 50K, 25K and 5K at Crystal Cove State Park on May 8, 2027 supporting the John Wayne Cancer Foundation.
Trail races at O'Neill Regional Park with multiple distances through Trabuco and Live Oak Canyons and a $5 parking fee.
June 2027
A trail event in Griffith Park offering a 26.2 mile team marathon relay and a single-loop 8K. Features chip timing for the relay, aid stations with medical staff, shirts, medals, prizes, food vendors and live DJs.