Trail Running calendar near Brea 2025-2026

Run the scenic O'Neill Park Trail Races in Trabuco Canyon with distances from 10k to 50k through oak and canyon singletrack. Expect rugged trails, great views and small town race vibes with on site parking and bib pickup options.

Bring 80s martial arts vibes to the LA River Path at the Cobra 5Kai, 10Kai and Half Miyagithon on May 16, 2026 in Canoga Park. Expect retro music, themed signage, costumed fun, a finisher medal and a same day virtual option.

Run the 10K at Big Bear Mountain Resort through high altitude pine forest on technical singletrack with Sierra views, wildflowers and wildlife. The weekend also features Spartan obstacle races and team starts.

Nanny Goat is a Memorial Day weekend multi distance ultrarun at a Riverside horse ranch where you run timed laps on a flat 1 mile loop. Camping, family friendly amenities and medals for every runner who completes at least one lap.

Return to Hahamongna Watershed Park on May 24, 2026 for a day of team relays and solo challenges. Choose a 50 km relay with teams of up to five, a solo 50 km ultra, or a 10 km fun run amid scenic Pasadena trails.

Run scenic mountain trails in the Angeles National Forest near Palmdale with 50k and half marathon options. Expect technical singletrack, big elevation and full race services including finisher medals, aid stations and finish line tacos.

Explore canyons and coastal ridgelines at the Malibu Canyon Trail Races in Point Mugu State Park, with distances from a half marathon up to 100K. Tackle challenging trails and views in Malibu with registration opening December 1, 2025.

Run Fullerton's inaugural 5K on dirt trails through Brea Dam and along the tennis center and golf course. Afterward enjoy a Health and Wellness Fair with local vendors, fitness demos and food trucks.

Take on the scenic Griffith Park trails with a team marathon relay or an individual 8K in Los Angeles on June 7, 2026. Enjoy live DJs, food trucks and a finisher shirt and medal at this Runner's World recommended event.

Join Phoenix Rising on June 13 at Griffith Park with distances from 5k to half marathon on scenic dirt trails. Enjoy custom finisher medals, goodie bags, free photos and videos, plus aid stations and stroller friendly routes.

Run the Old Zoo Half Marathon in Griffith Park, LA, on scenic, mostly flat trails with both a half marathon and 12K option. Limited spots after last year sold out, so grab your entry for a festive race, finisher medal and post race goodies.

Tough Topanga is a scenic trail run at Topanga State Park offering 10k, 15k and a kids 1k. Finishers get a local medal and tee, post race tacos and a beer garden plus cash prizes with proceeds benefiting LA Fire Station 69.

Take on the Mt. Baldy 5000, a scenic, mostly uphill mountain 5K at Mt Baldy Resort that tests your legs and rewards you with great views. Celebrate at the Top of the Notch with BBQ, live music and a relaxing chairlift ride back.

Run the Harding Hustle in Cleveland National Forest near Modjeska Canyon on July 18, 2026. Choose 15K, 30K or challenging 50K along scenic truck and forest roads with aid stations and a cupless, low support wilderness vibe.

Tough Mugu is a scenic trail run in Point Mugu State Park, Malibu with 25k and 10k courses featuring coastal ridges, single track and Channel Islands views. Expect chip timing, finisher medals, race shirts and cash prizes.

Hot to Trot at Griffith Park Crystal Springs in Los Angeles offers 5k, 10k, 15k and half marathon looped courses for runners and walkers, with stroller friendly routes and support for pacers and crews. Finishers get a custom medal, free pho..

Hit the trails for a lively 6k or 12k at the SoCal Summer Friday night run in Lower Arroyo Park, Pasadena on July 24, 2026. Stick around for tacos and drinks after the race; spots are limited so register soon.

Run under a full moon on the scenic Elder Creek Night Runs near Anza, California, with a 4.6 mile loop through manzanita, rock formations and Cahuilla Mountain views. Limited to 200 runners, multiple loop distances from 9 miles to 50K.

Run a 5K, 10K or Half Marathon around scenic Green Valley Lake, tackling a lake loop and a challenging climb to forest viewpoints on mixed paved and dirt roads. Enjoy post race festivities while supporting The Children’s Forest.

Riley Park Trail Races on August 1, 2026 at Thomas F Riley Wilderness Park feature a 3.3 mile loop with distances from 5k to 30k plus a 6 hour challenge. Every finisher receives a race shirt and medal and the course welcomes all paces.