Trail Running calendar near Simi Valley 2025-2026

Twilight's Last Gleaming Cross Country Challenge is a rare evening cross-country race held in Ventura, California. Now in its 40th year, it takes place on the last Saturday in October, except Halloween when it will be a week earlier. The co..

Event overview OC Trail Runners Group Run takes place on Saturday, October 25, 2025 in Newport Coast, California. The run is free, social and non-competitive, described as slower-paced and take-it-easy. The stated goal is to spend time outd..

The Santa Cruz Island Eco-Extreme Trail Half Marathon is a challenging 13.3-mile trail race held on Santa Cruz Island in Channel Islands National Park, California. Organized by the Ventura County Sheriff's Search and Rescue Upper Ojai Team,..

No Name Trail Races at Chesebro Canyon deliver scenic singletrack, runnable climbs and technical drops across 50k, half marathon and 5k options. Expect aid stations, a finisher medal, post race meal and a beer garden for 21 plus.

Monster Dash : Irvine, October 26, 2025 The event takes place at Bill Barber Memorial Park in Irvine on Sunday, October 26, 2025. Distances offered: 5k 10k 15k Half marathon Course, rules and logistics The course is an open route on a sha..

Run Griffith Park's fall Trail Races in Los Angeles, choose from 10K to 50K and tackle scenic single track trails up to the Hollywood sign. Friendly aid stations and stunning city views make this a must do autumn trail challenge.

Run scenic singletrack through historic Placerita Canyon at the Santa Clarita Trail Race, with 5K, 10K, half marathon and 28K options. Expect rolling climbs, panoramic valley views and a true trail challenge.

The Rock Cobbler Run at Rio Bravo Ranch on November 8, 2025 is a demanding off road trail race with a limited field of 300. Choose a 26 mile or 13 mile route and enjoy stocked aid stations, swag and post race food.

Run the Catalina Island Half Marathon or 10K in Avalon on November 8, 2025 for a scenic trail experience with climbs, summit ocean views and a finish in town. Family friendly with a Kids Fun Run and a Triple Crown challenge option.

Celebrate the 10th annual Chino Hills Trail Run Series Fall at Chino Hills State Park with challenging 30K and 50K trail routes that support the Discovery Center. Scenic single track, aid stations, and community spirit await.

Enjoy rolling trails and views at the 4 Mile Hill Challenge in Debs Park, part of the Aztlan Wellness Series with a green earth celebration and a pet friendly Run4Paws division. Kids can tackle the 2K Hill Challenge for family fun.

Join the 29th annual Patagonia Salmon Run 5K in Ventura on November 16, 2025, a lively community race supporting South Coast Habitat Restoration. This zero waste event celebrates local conservation with scenic coastal streets and post race..

Event details Ray Miller 50/50 is scheduled for Saturday, December 6, 2025, at Point Mugu State Park in Malibu, CA. The event listing states the 2025 edition is sold out. A waitlist is maintained and the listing indicates waitlisted entrant..

The Fremont Canyon 28k Trail Run is an exciting running event taking place in Irvine Regional Park, Orange, California. Scheduled for December 6, 2025, this challenging 28k (17.5 miles) course features fire roads with an elevation gain and..

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 in ocean views at Crystal Cove State Park on December 13, 2025 with 15K, 6K and kids 1K options for every pace. Finishers get medals and shirts, free photos and a festive post race beer garden and breakfast.

Join the Hanukkah 8 Krazy Kilometers in Bakersfield for a festive 8K or 2K Latke Loop at Panorama Vista Preserve along the Kern River. Enjoy medals, music, treats and a family friendly community run.

The Run for a Claus - Irvine will take place in Irvine on Saturday 20 December 2025. You can run 5 kilometers.

Event details Paramount Ranch Trail Runs is a trail running event scheduled for December 20, 2025, at Paramount Ranch in Agoura Hills, California. The event is described as a return to the local trails after recent years. The National Park..

Event details Ring in the New Year is a running event at Whittier Narrows Recreation Area on Sunday, January 4, 2026. The course uses marked out-and-back loops on the beach path and is an open course shared with other pedestrians, runners,..