Monrovia
Trail Running Calendar near Monrovia 2026-2027
Explore the top trail runs near Monrovia for 2026-2027! We've gathered 34 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
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.
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
An annual 100 mile ultramarathon through the San Gabriel backcountry, held since 1986; the 2026 edition uses an out and back course from Loma Alta Park.
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 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.
November 2026
Night trail races at Marvin Braude Mulholland Gateway Park in Tarzana offering 5K and 10K on fire roads with aid stations and required headlamps.
Charity run in Griffith Park on 11/14/2026 with pet and human divisions; proceeds support Run for Paws, which helps dogs in need.
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.
Friendsgiving fundraiser run at Whittier Narrows with 5k, 10k, 15k and half marathon out and back routes to benefit API Forward Movement.
Trail event in Griffith Park offering five distances from 10K to 50K on singletrack and fire road with detailed elevation profiles.
Trail runs in the Santa Monica Mountains on November 26 offering a half-marathon, 10k, and 5k with ocean views, aid stations, finisher medals, and a post race beer garden.
December 2026