Trail Running Calendar California 2025-2026

The Santa Cruz Trail Run, hosted by Inside Trail Racing, takes place at Henry Cowell Redwoods State Park in Felton, California. This scenic event features three distances: 10K, Half Marathon, and 30K, with courses winding through giant redwoods, twisting single-track trails, dirt fire roads, and a u..

Run-De-Vous is an ultramarathon event held at Harvey Bear Ranch Park in San Martin, California. The race features multiple distance options including 100 miles, 100 kilometers, 50 miles, 50K, a marathon, and a 4-person 50-mile relay. The course is a fast 2-mile loop set against scenic hills and dist..

The SPASM Crystal Springs Trail Run takes place in Woodside, California, at Huddart Park, offering runners a scenic experience through towering redwoods, lush ferns, and trails in Huddart Park, King's Mountain, and Bear Gulch. The event features multiple distances: 8K, Half Marathon, 35K, Marathon,..

The Mount Baldy Run to the Top is a challenging 7-mile trail race held in Mount Baldy, California. Celebrating its 60th running, the race starts at 6,000 feet elevation and ascends 4,000 feet to the summit of Mt. Baldy, the third tallest mountain in Southern California at 10,064 feet.This event is a..

The Gypsum Canyon Wilderness 5k is a trail running event held at Gypsum Canyon Wilderness in Anaheim, California. The 3.3-mile course features a mix of fire roads and single-track trails with an elevation gain of 350 feet, offering a moderately challenging run through natural terrain. Participants w..

The Noble Canyon 50K and 15K is an annual trail running event held in the scenic mountains of east San Diego, California, specifically in Pine Valley. The races take place on runnable single-track trails within National Forest land, offering participants stunning views and challenging terrain. The 5..

The Stevens Creek Striders Reservoir Run, held in Cupertino, CA, offers a scenic trail running experience with distances of a half marathon (13.2 miles), 11K, and a 2.5-mile Lollipop Loop charity run/walk. The course features shaded single-track trails and open vistas, including challenging steep as..

The Mendocino Running Festival, held in Mendocino Woodlands Park, California, offers a unique running experience amidst ancient redwoods and scenic trails. Participants can choose from a 10K, half marathon, or timed 6- and 12-hour races on a challenging 6-mile loop featuring single-track trails, log..

The Tanri Lake Race, held in Miramonte, California, is a challenging running event set at an elevation of about 6,000 feet. It features two race formats: a relay race and an individual race, both on a 5-mile loop course. The relay involves teams of three runners, each completing four loops in a set..

The Diablo Trail Run, held at Diablo State Park in Clayton, California, offers a variety of distances including 4 miles, 10 miles, half marathon, marathon, 50K, and a free kids' run for children 6 years and younger. The event features scenic courses with spectacular views of the San Francisco Bay Ar..

The Mammoth Bar Trail Runs, hosted by Skybreaker Racing, is a trail running event held in Auburn, California, within the Auburn State Recreation Area. Scheduled for September 7, 2025, the event features three race distances: a half marathon, 10K, and 5K. The courses traverse the single-track and dou..

The South Hills Single Track Trail Run - Summer, held at Calero County Park in San Jose, CA, offers a variety of distances including 50K, trail marathon, 16-mile, half marathon, 9-mile, 10K, 5K, mile, and a kids run. The course features challenging single track trails, hills, dirt paths, oak trees,..

The Berkeley Trail Adventure is a scenic trail running event held in Berkeley, California, within Tilden Regional Park and Wildcat Canyon. It offers four race distances: 10K, half marathon, 35K, and 50K, featuring technical dirt trails, fire roads, and some asphalt sections. The course showcases sha..

Mammoth Trail Fest is a multi-day trail running event held in Mammoth Lakes, California, set against the stunning Eastern Sierra backdrop. The festival features a variety of races including the challenging 50K and 26K single-loop mountain courses with significant elevation gains, the Dragon's Back A..

J Treequinox is a 12-hour ultra running event held on a private 20+ acre desert property near downtown Joshua Tree, California. The race features a 1-mile loop course, allowing participants to run at their own pace, one lap at a time. It offers a low-key atmosphere ideal for those new to ultra runni..

The Rocky Ridge Trail Half Marathon is a challenging trail race held in the scenic Las Trampas Wilderness near San Ramon, California. Scheduled for September 20, 2025, the event features a half marathon, 10K, and 5K distances. Known for its tough terrain and significant hills, the half marathon is n..

The Mt. Umunhum Marathon, Race to the Top and Down, is a challenging trail running event held in Almaden Quicksilver County Park, San Jose, California. This marathon features a rugged course that begins at the Hacienda Entrance and ascends to the summit of Mt.Umunhum, one of the prominent peaks in t..

That's No Moon Trail Races take place in the rugged Cleveland National Forest and Santa Ana Mountains near Silverado, California. Offering 50-mile, 50K, and 30K distances, the event challenges runners with significant elevation gains and technical terrain across remote single-track trails and forest..

The Run 4 The Miracle will take place in Fresno on Saturday 20 September 2025. You can run between 5 and 10 kilometers.

The Gold Rush Growler Trail Runs, held at Granite Beach in Folsom Lake State Recreation Area, feature scenic 10-mile and 5K trail races along shoreline and single-track trails. The 10-mile course includes paved park roads, secret trails, and varied terrain with aid stations offering water, electroly..