Trail Running calendar near Fullerton 2025-2026

Ring in 2026 with a scenic trail run at West Creek Park in Valencia. Choose from 5k to half marathon on marked out and back loops with aid stations and festive finisher medals.

Tackle scenic Lake Hodges trails at the Del Dios Trail Race on Jan 4, 2026, with distances from 5K to a challenging 50K. Run dirt service roads and single track, enjoy sweeping views, and compete at a Championship Qualifier event.

Start 2026 strong at Ring in the New Year in South El Monte on January 4 with 5k, 10k, 15k and half marathon routes on scenic Whittier Narrows trails. Enjoy custom medals, free photos and post race snacks.

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.

Run or hike to the iconic Hollywood Sign in Griffith Park on Jan 25, 2026. Choose distances from a kid run to an 8 mile course over scenic trails and roads, and enjoy a premium shirt, finisher medal, chip timing, awards and free photos.

Run or hike through Griffith Park to the iconic Hollywood Sign on out and back courses ranging from a kids run to 8 miles. Enjoy skyline views, chip timing, aid stations and a finisher medal.

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 scenic backcountry trails at Boney Mountain Trail Run in Newbury Park on February 7, 2026, with half marathon and 7k options. Expect rugged single track, ocean views, creek crossings and lively post race festival with tacos and awards.

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.

Run scenic park trails at Kenneth Hahn with 5k, 10k, 15k and half marathon options on February 8, 2026. Enjoy custom finisher medals, goodie bags, free photos, on course aid and a challenging hill for a true outdoor racing day.

Run The Ranch 50K or Half Marathon at scenic Daley Ranch in Escondido on February 14, 2026. Challenging looped trails with big elevation and stocked aid stations make this a rewarding SoCal Ultra Series qualifier for trail lovers.

Celebrate Valentine's Day with a scenic road and trail run at Griffith Park, offering distances from 5K to half marathon and custom finisher medals. Enjoy aid stations, free photos, and a festive postrace vibe for runners of all paces.

Take on scenic single track trails at the ninth annual San Pasqual Valley Trail Race in Escondido, with 20 Mile, half marathon and 10K options that summit Raptor Ridge. Celebrate at the finish with free wine tasting from local vineyards.

Run the 4 Mile Hill Challenge at Debs Park on scenic trail with rolling climbs, or try the 2K youth hill challenge for adventurous kids. Pet friendly and includes a shirt at packet pickup, but the event is postponed due to severe weather wa..

Run through an active limestone quarry at the Cemex Quarry Quest 5K in Rialto, where rugged terrain and towering industrial equipment create a thrilling backdrop. Enjoy a memorable race while supporting cancer awareness and fundraising.

Run Catalina Island's iconic trail marathon, 10K and 5K through the Conservancy with ocean views and rolling hills. Celebrate the 48th annual event, California's State Off Road Marathon Championship, on March 14, 2026.

Singletrack Stampede in Calabasas features scenic, technical trails on the Millenium Loop with switchbacks and creek crossings. Pick the 22k with a $500 course record bonus or the punchy 10k. Entry includes a local finisher medal, photos an..

Experience scenic single track ridgelines and canyon trails in the Valencia hills north of Los Angeles on March 21, 2026. Choose a 10K, half marathon or challenging 50K ultra with big climbs, aid stations and finishers' swag.

Run the Coast to Crest 10K or 5K on scenic Del Mar trails, with mostly flat, hard packed dirt and wide lagoon views. This out and back race is the final Championship Qualifier of the Sunshine Series and finishes with a fun downhill.

Run the Griffith Park Trail Marathon in Los Angeles, a scenic out and back through single track trails and fire roads that reaches the Hollywood sign summit. Options from 10K to 50K make it perfect for beginners and ultrarunners alike.