Trail Running calendar near Simi Valley 2025-2026

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.

Celebrate the OC Marathon Run for a Claus on Dec 20, 2025 at The Great Park in Irvine with festive 5K and 1 mile runs plus virtual options in December. Grab a Santa hat, medal and cookies while supporting local charities.

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.

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 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 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.

Celebrate Valentine's Day at Griffith Park with A Better World Running for scenic trail runs including 5k, 10k, 15k and a half marathon. The course is marked with cones and aid stations, and all finishers get a custom medal plus free photos..

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 scenic trails at Tejon Ranch near LA with options from 11k to a rugged 100k through canyons, creeks and sage country. Fully marked courses, staffed aid stations, camping and a finish festival with food and beer.

Experience rugged mountain trails and sweeping views at Tierra Redonda Mountain Trail Run and Camp in Bradley California on November 15 2025. Choose from epic 48 hour and 24 hour challenges or 20 km 10 km and 5 km distances.

Run the Catalina Island Marathon, 10K or 5K in Avalon on March 14, 2026 and explore scenic coastal trails through the Catalina Island Conservancy. Now in its 48th year, this storied off road race is a must for adventurous runners.

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..

Tackle the Santa Barbara Nine Trails 35 mile course on scenic coastal trails with steep, technical terrain and over 10,000 feet of climbing. This remote, challenging route rewards experienced trail runners with amazing views.

Take on scenic ridgelines and canyon trails at the VALENCIA Trail Race in Valencia Santa Clarita CA on March 21 2026, with 10K, half marathon and 50K ultra distances. Expect big climbs, aid stations and a finisher medal in a limited field e..

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.

Challenge yourself at the Billy Goat Mountain Climb near Silverado with steep climbs and sweeping views through Cleveland National Forest. Choose a 17 mile loop, half marathon or 10K and finish with a medal, race shirt and post race snacks.