Trail Running calendar near Fullerton 2025-2026

Tackle scenic single track trails at Elfin Forest in the Keepin' It Rural 5K and 10K, where runners get chip timing and a festive post race party. Enjoy a tech shirt, finisher medallion and a beer while supporting Escondido Creek Conservanc..

Run the scenic coastal trails of Crystal Cove State Park on December 13, 2025 at the Crystal Cove Trail Run with 15K and 6K courses plus a kids 1K. Celebrate at the post race party with breakfast, a 21 and over beer garden, free photos and..

Experience the Dixon Lake 10/10 Trail Race at Daley Ranch in Escondido on December 13, 2025 with 10 mile, 10K and 5K courses on scenic single track and dirt roads. Limited to 300 runners, the 10 mile reaches Standley Peak for panoramic view..

Run under the stars on fully marked fire road courses at Mulholland Gateway Park in Tarzana, with 5K and 10K night options. Bring a working headlamp, enjoy aid stations, and collect a finisher medal and shirt.

Take on the Chino Hills Trail Run Series Fall at Chino Hills State Park on Dec 13, 2025 with 30K and 50K routes through chaparral and oak woodlands. Aid stations and sweeping views make this a must for fall trail lovers.

Celebrate the season with the Holiday Fun Run at Griffith Park, offering 5k, 10k, 15k and half marathon routes on scenic dirt horse trails and grassy starts. Enjoy on course aid, a finisher medal, free photos and post race snacks.

Run or walk the 10th annual Homeless for the Holidays at Griffith Park on a scenic flat 5K or 2.5K, with chip timed and self paced options. Proceeds support Pennies From Kevan and local programs serving those facing homelessness.

Take on dirt trails at Paramount Ranch in Agoura Hills with distances from 10K to 50K for every trail runner. Enjoy scenic post fire recovery vistas and a supportive trail community on challenging winding terrain.

Get into the holiday spirit at Run for a Claus in Irvine on Dec 20, 2025, with 1 mile and 5K options plus virtual entries. Enjoy festive music, cookies, a Santa hat, finisher medal and support local charities and kids.

Ring in 2026 with the Happy New Year Run at West Creek Park in Valencia, CA. Choose from 5k, 10k, 15k or half marathon on scenic looped trails, enjoy finisher medals, free photos and a festive start to your year.

Tackle the Del Dios Trail Race "The Race of the Gods" at Lake Hodges in Escondido on Jan 4, 2026. Choose from 5K to 50K on scenic dirt roads and single track with up to 1000 feet of climbing in this championship qualifier.

Ring in the New Year with a scenic trail run at Whittier Narrows Recreation Area on January 4, 2026. Choose 5k, 10k, 15k or a half marathon and enjoy finisher medals, free photos, aid stations and a festive post race vibe.

Start 2026 strong with Ring in the New Year at Whittier Narrows Recreation Area. Choose from 5k to half marathon on scenic park trails and earn a custom finisher medal, goodie bag and free event photos.

Run scenic San Pasqual trails on Jan 10, 2026 with distances from a youth 1 mile to a 50 mile ultra. Finishers get a tri blend shirt, handcrafted wooden medal, free race photos and awards for top finishers.

Experience the Hollywood Sign Run | Hike in Griffith Park on Jan 25, 2026 with scenic out and back trails to the iconic Hollywood Sign and sweeping views of downtown Los Angeles and the Griffith Observatory. Distances from a kid run to 8 mi..

Run or hike through iconic Griffith Park with routes for 8 mile, 8K, 5K and a 2.2K kids run, finishing near the Old Zoo. Enjoy skyline views of the Hollywood Sign, a finisher medal and post race snacks.

Run the Sean O'Brien trail race in Calabasas on Jan 31, 2026 for scenic trails and rewarding climbs across multiple distances. Choose from 30K to 100K with the 100K as a Western States 100 qualifier; register by Dec 15.

Run beneath Boney Mountain on rugged single track with creek crossings and ocean views. Choose a backcountry half or 7k and enjoy a lively post race festival with tacos, massages and finisher swag.

Kick off the Trail Half Series by exploring scenic backcountry trails, creek crossings, and ocean views at Rancho Sierra Vista in Thousand Oaks. Tackle a 13.1 mile half marathon or a 4.4 mile 7k and enjoy post race food, photos, and awards.

Join Game Day on Feb 8, 2026 at Kenneth Hahn State Recreation Area in Los Angeles for 5k, 10k, 15k and a half marathon. Enjoy custom finisher medals, free photos, snacks and a scenic park course with a challenging hill.