Trail Running Calendar California 2025-2026

The South Bay 24 will take place in San Diego on Friday 15 August 2025. You can run between 13 and 24 kilometers.

The Almaden Hills Trail Run - Summer is a challenging trail running event held at Almaden Quicksilver Park in the scenic Almaden Valley, San Jose, California. The course features a mix of 60% dirt roads and 40% single-track trails with significant elevation gains, offering runners beautiful views an..

The Redwood (Summer) Trail Run, held in Oakland, California, offers a scenic race experience through Redwood Regional Park. Participants can choose from multiple distances including 5 miles, half marathon, 30K, marathon, 50K, and a free kids' 50-yard dash for children six and under. The course featu..

The Tamalpa Headlands 50K is a challenging ultramarathon held annually in Marin County, California, starting and finishing at Santos Meadow near Muir Woods. Covering 50 kilometers with about 6,500 feet of elevation gain, the single-loop course features renowned trails such as Coastal, Miwok, Steep R..

The Bulldog Ultra, held in Malibu Creek State Park, Calabasas, CA, is Southern California's oldest 50k trail race, celebrating 33 years in 2025. Offering both 50k and 25k distances, the course features challenging climbs with 5,784 and 2,947 feet of elevation gain respectively, winding through the s..

The Desolate Peaks will take place in Lower Forni from Saturday 16 August 2025 to Sunday 17 August 2025.

Race Thru the Redwoods is a scenic running event held in Felton, California, starting and finishing at Roaring Camp Railroads. The main 10K race takes participants through the majestic redwoods of Henry Cowell Redwoods State Park, offering a beautiful natural setting. The event also features a Kids..

The Trail Run at Sly Park - Summer is a scenic trail running event held at the Sly Park Recreation Area in Pollock Pines, California, within the El Dorado National Forest. The race offers multiple distances including 5K, 10K, 8 Mile, Half Marathon, 17 Mile, Trail Marathon, and a 50K ultra. Courses w..

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

The OC Trail Runners Group Run is a free, social, and non-competitive trail running event held in Newport Coast, California, at El Moro and Laguna Coast Wilderness Park. Designed for runners with some trail experience, the group enjoys a relaxed pace and changing routes each time. The upcoming run c..

The Double Dipsea is a challenging 13.7-mile trail race held annually at Stinson Beach, California, celebrating its 55th running in 2025. The course follows the legendary Dipsea Trail from Stinson Beach to Mill Valley and back, featuring steep hills, numerous stairs, and stunning views. Unique to th..

The Envirosports - Angel Island Half Marathon will take place in Belvedere Tiburon on Saturday 23 August 2025. You can run between 10 and 13 miles.

The Santa Cruz Track Club Cross Country Challenge will take place in Santa Cruz on Sunday 24 August 2025. You can run 4 miles.

The Los Angeles Sunset Trail Relay is a scenic trail running event held in Griffith Park, Los Angeles, featuring a 15K solo race, a 5K solo race, and a 30K relay for teams of four. Set during the golden hour, runners experience panoramic views of Griffith Park, Downtown LA, the LA River, and Glendal..

Run-De-Vous is a multi-distance running event held at Harvey Bear Ranch Park in San Martin, California. Scheduled for August 29, 2025, it offers a variety of race options including 100 miles, 100K, 50 miles, 50K, marathon, half marathon, and a 4-person 50-mile relay. The course is a fast 2-mile loop..

Ryan's Ranch Run is a community running event held in Pismo Beach, California, featuring 5K, 10K, and Kids Mile races. Participants enjoy a unique course that winds through a private working cattle ranch located on the back side of the Pismo Preserve, offering scenic views and a distinctive outdoor..

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 Apple City 5k is an inaugural running event held at Pinto Lake County Park in Watsonville, California. Celebrating the agricultural heritage of the Pajaro Valley, the race features a scenic 5k course along gentle trails that circle the park's meadows. In addition to the main 5k, there is a Kids..

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 serv..

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..