Trail Running Calendar California 2025-2026

Quarry Turkey 2025 takes place at Quarry Lakes Regional Recreation Area in Fremont, California, on the Saturday after Thanksgiving. The event offers a fast, mostly-flat course on Quarry Lakes trails with options for a half marathon, 10K, or 5K, plus a free Little Turkeys Run for children (about 100..

Boundiful Endurance Runs take place at Washburn Ranch in Hemet, California, featuring a one-mile loop on a 100% hardpacked dirt surface through a Southern California fruit and nut farm. The event offers multiple race options including 3, 6, 12, and 24-hour runs, a 100-mile solo challenge, and relay..

Quad Dipsea is an ultramarathon held in Mill Valley, California, starting at Old Mill Park. The event features four grueling laps along the Dipsea Trail to Stinson Beach and back, totaling roughly 28 miles with about 9,000 feet of elevation gain. Runners confront famous climbs and rugged terrain, in..

Black Mountain Turkey Burner, part of the Endurance Race Series’ Sunshine Schedule, is a trail race held at Black Mountain Ranch Park at 14700 Carmel Valley Rd, San Diego, California. The event offers four distances: Half Marathon (13.1 miles), 10K (6.4 miles), 5K (3.7 miles), and a Kids Dash. All r..

The Krampus Cross Country is a festive running event held in San Francisco, California, featuring live and virtual options. Participants can choose from three distances: a 5K, 10K, or the challenging Naughty Nine Miler. The live races start at the Ecology Trail Head at the end of Barnard Avenue, wit..

The Island View Endurance Run, held in Goleta, California near Lompoc, is a challenging trail running event featuring distances of 25km, 50km, 100km, and 100 miles. The course is primarily on trails and fire roads, offering stunning views of the Central Coast and the Channel Islands. Runners face si..

The Ray Miller 50/50 is a trail running event held at Point Mugu State Park in Malibu, California. Scheduled for December 6, 2025, the race offers three distance options: a 50-mile ultra, a 50K, and a 30K. The course takes runners through the scenic terrain of the state park, known for its natural b..

Over The Hill Track Club presents the High Desert Ultra, a Ridgecrest, California event offering 50K and 30K for desert trail runners, with a new 10K added. Runners traverse looping dirt roads through rolling desert terrain, offering views of the southern Sierras, Rademacher and Spangler Hills, and..

Anza Borrego Cuyamaca 50 Mile Run is a point-to-point ultramarathon covering 50 miles from the Sunrise Trailhead near Julian, California, to Stagecoach Trails RV Resort & Campground. The course climbs to Stonewall Peak, winds through wooded trails near a lake, then descends into Oriflamme Canyon and..

The San Joaquin River Trail race takes place on Saturday, December 6, 2025, in Friant, CA at the S. Finegold Picnic Area. The event includes the following distances: 50k 25k 10k The courses run along trails near Millerton Lake and the San Joaquin River. Runners receive a finishers medal and race..

The Peacock Gap Trail Run is scheduled for Saturday, December 6, 2025, at China Camp State Park and Harry Barbier Memorial Park in San Rafael, CA. The event offers three distances: 30K - 19.5 miles, 2,735 ft elevation gain Half Marathon - 13.1 miles, 1,800 ft elevation gain 10K - 6.3 miles, 1,140..

ZombieRunner Quarry Lakes takes place on Saturday, December 6, 2025, in Fremont, CA at Quarry Lakes Regional Recreation Area (Ensenada Pavilion). The event includes multiple distance options: 5K 10K Half Marathon 30K Marathon 5K (12 yo & under) 5K (13 - 17 yo) 10K (12 yo & under) 10K (13 -..

Death Valley Trail Marathon & Half Marathon takes place in Death Valley National Park, Inyo County, California. Distances include marathon and half-marathon on Westside Road dirt trail through Badwater Basin. The half is an out-and-back; the marathon repeats the loop.Turnaround is near valley’s lowe..

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 loss of 2860 feet, making it suitable for experienced runner..

The Calero Trail Run - Winter is a versatile trail running event held at Calero County Park in San Jose, California. It offers a range of distances including a 50K, trail marathon, 25K, half marathon, 15K, 10K, 5K, mile, and a kids run, catering to all levels of runners. The course features scenic s..

Hunter S. Thompson Fear & Loathing in San Francisco is an urban ultramarathon offering 50K or 50 miles. Located in San Francisco, the single-loop course starts and finishes atop Twin Peaks, with the city spread out beneath.The 50K route is about 99% city streets; the 50-mile option includes some tra..

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 for hikers. The race begins and ends at the Olivenhain Dam,..

The Dixon Lake 10/10 Trail Race is the 5th annual event held at Daley Ranch in Escondido, California. The event date is December 13, 2025. The venue address is El Caballo Park, 3450 E. Valley Parkway, Escondido, CA 92027. The 10-mile course reaches the top of Stanley Peak and includes a 360-degree..

2025 Hark the Herald Half Marathon & 10K, the 37th annual edition, takes place at Angel Island State Park, Belvedere Tiburon, California. The Half Marathon is two loops on a hilly trail; the 10K is a single loop. The event is limited to 400 participants, creating an intimate atmosphere with panorami..

Summit Rock is Brazen Racing’s trail event held in the redwood and pine forests of Sanborn County Park, just outside Silicon Valley in Saratoga, California. Runners can choose from a 5K, 10K, or half-marathon, all on miles of single-track trails through the Santa Cruz Mountains. The course features..