Trail Running calendar near Big Bear 2025-2026

Hit the autumn trails at Chino Hills State Park on November 15, 2025, with 30K and 50K options. Well marked courses, plentiful aid and sweeping views support the Discovery Center for a spirited day of trail running.

Celebrate the City of Fullerton's inaugural 5K Trail Run through scenic Brea Dam trails near the Fullerton Tennis Center and Golf Course. After the race, enjoy a Health & Wellness Fair, food trucks, a finisher shirt, medal and free photos.

Run a scenic one mile loop at Washburn Ranch in Hemet with 100 mile, 24 hour and relay formats, live tracking, on site camping and close aid. Buckles await solo runners who complete 100 miles within the 31 hour window.

Join the San Clemente Santa Run on December 6, 2025 for a festive 5K or fun run along the beach, starting at the Pier Bowl. Celebrate with music, an auction and dinner while supporting Lily's Lighthouse and epilepsy research.

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..

The Tenth Annual Keepin' It Rural 5K/10K Trail Race and Festival takes place at the scenic Elfin Forest Recreational Reserve in north San Diego. This unique event features chip-timed races for both 5K and 10K runners, with a special course..

Celebrate the SoCalTrail season finale at Crystal Cove State Park in Laguna Beach with scenic coastal trails and challenging climbs on 15k and 6k courses. Family friendly 1k for kids, cash prizes for 15k podiums, finisher medal, breakfast a..

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 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.

Join the 22nd annual Calico Trail Run on Sunday January 25 2026, choose 30K or 50K through the historic Calico Ghost Town and Mojave Desert mountains near Yermo California. USATF sanctioned trails promise epic scenery and a true desert chal..

Take on scenic Daley Ranch trails in Escondido with a rugged 50K or a half marathon loop around Dixon Lake. Expect big climbs, well stocked aid stations, and a welcoming trail community on February 14, 2026.

Hit the trails in Moro Canyon at Crystal Cove State Park in Laguna Beach with 6K and 10 mile courses offering ocean views, climbs, and flowing descents. Race photos, a shirt, and a finisher medal are included.

Billy Goat Mountain Climb on April 4, 2026 in Silverado CA invites runners to tackle scenic, challenging climbs through Cleveland National Forest with a 10K, half marathon, or a 17 mile Silverado Loop with big elevation gain. Finish line sh..

Run or ride around scenic Diamond Valley Lake on April 11 and 12, 2026 with distances for all levels from youth mile to marathon and gravel rides. Enjoy single track trails, cupless aid stations, custom finisher shirts and handcrafted woode..

Join the Run4Kids Ultra Running Party in Corona, CA on April 17 and 18, 2026 for a weekend of road and ultramarathon racing. Choose distances from half marathon to 100 mile or try timed events while supporting youth runners.

Badwater Salton Sea is an 81 mile team ultra from Salton City below sea level to Palomar Mountain, mixing desert roads and single track through Anza Borrego. Teams of two or three run together with support crews for a tough, scenic ascent a..

Challenge yourself on rugged trails at The Oaks on the Soboba Reservation with marathon, half, 5K and kids 3K options. Expect hills, stream crossings and great community energy as part of a race supporting Noli Indian School scholarships.

Run as far as you can in the redwood grove at Carbon Canyon Regional Park in Brea, choosing a 3, 6, or 12 hour timed division. Looping trail laps, stocked aid and finisher shirt and medal make this a scenic endurance challenge.

Run scenic trails at O'Neill Regional Park on May 16, 2026, with distances from 10k to 50k for every level. Expect challenging singletrack, on site bib pickup, and a friendly race day vibe that welcomes beginners and ultrarunners.

Run the 10K Spartan Trail at Big Bear Lake on singletrack through high altitude pine forest with technical climbs, descents and sweeping Sierra views. A scenic, challenging mountain course that joins a Spartan Trail weekend of adventure.