Trail Running Calendar California 2025-2026

J Treequinox is a unique 12-hour running event held on a private 20-acre desert property near downtown Joshua Tree, California. Designed for both novice and experienced ultra runners, participants can tackle the course at their own pace, completing laps on a one-mile loop. The event features a festi..

Run 4 The Miracle is an annual running event held at historic Cobb Ranch, featuring scenic routes along the San Joaquin River. Participants can choose from a 5K run/walk, a 10K trail run, and a 2-mile fun walk/run. The event aims to support the Valley Children's Hospital Pediatric Trauma - Injury Pr..

The Mt. Umunhum Marathon, known as the Race to the Top and Down, offers an exhilarating trail running experience in the scenic South Bay Area hills. Participants will start at the Hacienda Entrance of Almaden Quicksilver Park, ascend to the summit of Mt.Umunhum, and then race back down. This event s..

That's No Moon Ultras is a challenging trail running event set in the stunning landscapes of the Cleveland National Forest and Santa Ana Mountains in Southern California. Participants can choose from three distances: 50 miles, 50K, and 30K, all featuring demanding courses with significant elevation..

The Sunset & Cider Trail Races, taking place in Auburn, CA, on September 27, 2025, offers an exciting opportunity for trail runners of all levels. Participants can choose from three race distances: a challenging 50K, a scenic 13-mile half marathon, or a 5-mile run. The event features beautiful trail..

The Ridge Rambler Half Marathon is a scenic running event taking place in Bridgeport, California, on September 27, 2025. This half marathon features a point-to-point course that starts at an elevation of approximately 7,100 feet and includes a mix of steady terrain and rolling hills, culminating at..

The Dick Collins Firetrails will take place in Castro Valley from Saturday 27 September 2025 to Sunday 28 September 2025. You can run between 42 and 100 kilometers.

The Angeles National Forest Trail Race, celebrating its 20th anniversary, offers both 25K and 50K race options on September 27, 2025, starting and finishing at the iconic Mt. Wilson Observatory. Set in the scenic San Gabriel Mountains, the 25K features a challenging 3,500 feet of elevation gain, whi..

The Big Sur Trail Marathon, Half Marathon, and 5 Mile event will take place on September 27, 2025, at Andrew Molera State Park in Big Sur, California. Celebrating its 35th annual edition, this challenging race offers stunning views of the California coastline as participants navigate the hilly terra..

The Bandit Ultra Trail is a premier trail running event taking place in Simi Valley, California, featuring three race distances: 50K, 30K, and 15K. Set against the stunning backdrop of Rocky Peak, participants will navigate through picturesque mountains, steep canyons, and diverse wildlife habitats...

The Pacifica Summit Run is an exciting running event taking place at San Pedro Valley State Park in Pacifica, CA. Participants can choose between a 10K and a Half Marathon, both offering stunning views of the Pacific Ocean coastline and challenging switchbacks. This event is designed for runners of..

The 2025 San Jose Trail Challenge, hosted at Sanborn County Park, offers a thrilling experience for runners of all levels with distances of 10K, 21K, and 50K. Set against the stunning backdrop of the Santa Cruz Mountains, participants will navigate well-groomed yet challenging trails featuring signi..

The Back on the Ranch Trail Run, hosted by AllWeDoIsRun, is an annual running event taking place at Sand Creek Ranch in Los Olivos, California. Scheduled for October 4, 2025, participants can choose from various race durations, including 3, 6, 12, 24, and 48 hours, completing as many 3.25-mile laps..

The Women's Headlands Half Marathon, taking place on October 4, 2025, is a scenic running event set in the stunning Marin Headlands, starting and finishing at Rodeo Beach. This annual race features a challenging half marathon distance of 12.6 miles with an elevation gain of 2,494 feet, as well as a..

The Wild Wild West Marathon & Ultra, held in Lone Pine, CA, is the oldest trail marathon in the United States, celebrating over 45 years of tradition. This scenic event features a variety of race options, including a 50-mile ultramarathon, a 50K, a full marathon, and a 10-mile race, all set against..

The Star City San Bruno Mountain Half Marathon, organized by the Excelsior Running Club, is set for October 4, 2025. This scenic race features a challenging 13.1-mile course that is 93% on trails, with a total elevation gain of 2,400 feet, offering stunning views of the Pacific Ocean, Bay, and San F..

The Cuyamaca 100K is an endurance running event set in Cuyamaca Rancho State Park, located about an hour east of San Diego, California. The course features three distinct loops, starting and ending at Camp Cuyamaca, with minimal backtracking. The first loop spans 31.5 miles and includes a climb to C..

No Name 5025 is an exciting running event held in Cheesebro Canyon, featuring a challenging 50k ultramarathon, a 25k trail run, and a 10k trail run suitable for all levels. Participants will experience diverse terrain, including runnable ascents, winding singletracks, steep fire road climbs, and smo..

The Reservoir Dogs Trail Run, taking place at the San Pablo Reservoir in Orinda, CA, features three race distances: 10K, Half Marathon, and 35K. This unique event allows participants to fully circumnavigate the scenic Briones Reservoir on trails typically reserved for permit-only access. Runners wil..

The Auburn Half Marathon, scheduled for October 4, 2025, takes place in the historic town of Auburn, California, known as the "Endurance Capital of the World." This trail running event features a half marathon, 12K, and 5K, all set against the scenic backdrop of the Western States Trail. Participant..