Trail Running Calendar California 2025-2026

The Calero Trail Run - Winter takes place at Calero County Park in San Jose, California, offering a variety of distances including 50K, trail marathon, 25K, half marathon, 15K, 10K, 5K, mile, and a kids run. The course features diverse terrain with single track trails, hills, dirt paths, oak trees,..

The Over The Hill Track Club High Desert Ultra, held in Ridgecrest, California, is a well-established trail running event featuring 50K, 30K, and a new 10K distance added for 2025. The race courses traverse rolling desert terrain with elevations ranging from 2,400 to 3,500 feet, offering scenic view..

The Hunter S. Thompson Fear & Loathing is a unique ultra running event held annually in San Francisco, CA, since 1985. It offers two distances: a 50K and a 50-mile single-loop course starting and finishing at Twin Peaks, the city's highest viewpoint.The route covers iconic city landmarks and feature..

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 Summit Rock Half Marathon, held at Sanborn County Park in Saratoga, California, offers runners and walkers a scenic experience through the redwood groves of the Santa Cruz Mountains. Participants can choose from a half marathon, 10K, or 5K race, all featuring miles of single-track trails with fi..

The Hark the Herald Half Marathon & 10K is an annual running event held at Angel Island State Park near Belvedere Tiburon, California. The race features a scenic, hilly loop trail around Angel Island, offering stunning panoramic views of the Golden Gate Bridge, San Francisco, Alcatraz Island, the Ea..

The Doomsday event in Cool, California, offers runners a challenging 50K and a Half Marathon on a scenic course with significant elevation gains—5,100 feet for the 50K and 1,250 feet for the Half Marathon. Both races start at the Cool Staging Area and feature generous cutoff times (9.5 hours for the..

The Dixon Lake Trail Race, held annually at Daley Ranch in Escondido, California, offers runners scenic trail runs with distances of 10 miles, 10K, and 5K. Starting at El Caballo Park, the 10-mile course ascends to Stanley Peak, providing participants with stunning 360-degree views. Elevation gains..

The Crystal Cove Trail Run, held at Crystal Cove State Park in Laguna Beach, California, offers a scenic and challenging trail running experience just minutes from the beach. The event features three distances: a 15k, a 6k, and a Kids 1k race. Both the 15k and 6k courses include fire road climbs, ri..

The Folsom Lake Point to Point Trail Half Marathon is a scenic trail race held in El Dorado Hills, California, near Sacramento. The 13.1-mile course is predominantly single track (95%) with some dirt road (5%), running alongside the picturesque Folsom Lake. Runners experience a mix of gentle rolling..

The Hanukkah 8 Krazy Kilometers is an annual family-friendly running event held in Bakersfield, California, organized by Temple Beth El. The 8K and 2K races take place at the scenic Panorama Vista Preserve, part of the Kern River Parkway, featuring natural trails along the Kern River below the Panor..

Placerville's Holiday Jingle & Mingle Run takes place on the scenic El Dorado Trail in historic Placerville, California. The event offers multiple race distances including a half marathon, 15k, 10k, 5k, mile, and a kids run, accommodating runners of all levels. The course features beautiful oak tree..

The Woodside Ramble, hosted by Inside Trail Racing, is a scenic trail running event held at Huddart County Park in Woodside, California. It offers four distances: 10K, Half Marathon, 35K, and 50K, featuring challenging courses through redwood-shaded trails, mixed evergreen forests, and chaparral-cov..

The Paramount Ranch Trail Runs, held in Agoura Hills, California, offer a variety of race distances including a 50K, marathon, 30K, half marathon, and 10K. Set on scenic trails at the historic Paramount Ranch, the event provides runners with a challenging and picturesque course through natural terra..

The Dirty December Trail Run in San Diego, CA, is a festive holiday trail running event featuring multiple race distances including a marathon, half marathon, 10K, and a unique 6-hour hill climb race. Participants can run in costume for a chance to win awards in solo or team categories, adding a fun..

The Brazen New Year's Eve event, held at Lake Chabot in Castro Valley, California, offers runners and walkers the opportunity to participate in a half marathon, 10K, and 5K trail races. This festive race encourages participants to close out the year with a scenic run on beautiful trails, welcoming a..

The Auburn Resolution Run is a trail running event held at Overlook Park in Auburn, California. Scheduled for January 1, 2026, it offers multiple race distances including 5K, 10K, 10 miles, and a virtual run option for any distance. This event provides a refreshing and adventurous way to start the N..

Brazen New Year's Day is an annual running event held at Lake Chabot in Castro Valley, California. It offers participants the choice of a half marathon, 10K, or 5K race, all set on scenic trails around the lake. The event is known for its invigorating course featuring challenging ascents and descent..

The Lost Coast 55K is a challenging ultramarathon held in Humboldt County, California, starting at the Horse Mountain Creek Trailhead near Whitethorn. Covering 34.3 miles with about 6,500 feet of elevation gain, the course features a mix of rough backcountry gravel roads and quiet pavement. The rout..

The Hacienda Hills Trail Run - Winter is a trail running event held at Almaden Quicksilver County Park near San Jose, California. It offers nine race distances ranging from a Kids Run and 1 mile to challenging ultra distances like 50K and a trail marathon. The courses feature increasing elevation ga..