Trail Running Calendar California 2025-2026

The Riley Park Trail Races, held in Thomas F. Riley Wilderness Park in Orange County, California, offer a variety of distances including a 30k, half marathon, 10 miler, 10k, 5k, and a unique 6-hour race. This family-friendly event features scenic single and double track trails, providing runners wit..

The Angeles Crest 100 Mile Endurance Run, held annually since 1986, is a challenging point-to-point ultramarathon in the San Gabriel Mountains of Southern California. Covering 100 miles from Wrightwood to Altadena, the course features elevations from 1,135 to 9,300 feet, with steep climbs, rocky ter..

The Rodeo Valley Trail Run, held in the scenic Marin Headlands near Sausalito, California, offers trail races of 8K, Half Marathon, 30K, and 50K distances. Starting near historic Fort Cronkhite and Rodeo Beach, the course features challenging steep climbs and descents along coastal trails with stunn..

The Green Valley Lake Half Marathon, held in the San Bernardino Mountains between Running Springs and Big Bear, offers a scenic and challenging mountain race experience. The course begins with a flat 3/4 mile loop along the lake, then ascends gradually with a 400-foot climb to a rewarding overlook...

The Point Mariah Trail Marathon, hosted by Donner Party Mountain Runners, takes place near Truckee, California, at the Soda Springs Ski Resort. This unique trail marathon covers approximately 26.4 miles with about 4,300 feet of elevation gain, featuring a multi-loop course through the protected Roya..

The Skyline 50K Endurance Run, held annually in August at Lake Chabot Marina in Castro Valley, California, is the longest-running 50K race in the state and one of the oldest in the U.S. The course features a large loop through the scenic East Bay Regional Parks, reaching Skyline Gate. Known for its..

The Into the Wild OC Trail Run is a 5K trail race held at Saddleback Wilderness in Orange, California. The course features a mix of fire roads and single-track trails with an elevation gain of 300 feet, offering a moderately challenging run through natural terrain. Participants will find one aid sta..

Bear Creek is a trail running event held in Lafayette, California, featuring a half marathon, 10K, and 5K distances. The courses are known for their challenging hills rather than being flat or fast, offering runners and hikers a scenic experience through Briones Regional Park. Participants receive c..

The Windfall Full Moon Trail Run, held in Alpine, California, offers a unique nighttime trail running experience under the bright full moon. Participants can choose from four distances: 5K, 10K, 15K (combining 5K and 10K loops), and a challenging 30K (running the loops twice). The course features mo..

The Mount Madonna Challenge, held in Gilroy, California, is a historic trail running event featuring a half marathon, 10K, and 5K races. Known for its challenging elevation gains—2,828 feet for the half marathon, 1,532 feet for the 10K, and 843 feet for the 5K—the race courses offer a rigorous test..

The Pinecrest Run is an annual running event held in Pinecrest, California, set in the scenic Sierra Nevada mountains. Celebrating its 49th year in 2025, the event features a 5-mile recreational run that winds through the roads of Pinecrest and along the shores of Pinecrest Lake, as well as a shorte..

The SAR Wild Run is a family-friendly trail running and hiking event held at Shaver Lake, California, at an elevation of 5,400 feet. Scheduled for August 10, 2025, it features multiple distances including a Trail Half Marathon, 10K Trail Run, 5K Trail Wild Run, 2-Mile Hike, and a virtual option. The..

South Bay 24 is an endurance running event held at Montgomery Waller Community Park in San Diego, featuring a 1.25-mile loop course that includes trail, grass, and bike path surfaces. The event offers multiple race options: a 24-hour race, 12-hour day and night races, a 6-hour race, and a half marat..

The Bulldog Ultra is Southern California's oldest 50k trail race, held in the scenic Santa Monica Mountains at Malibu Creek State Park in Calabasas, CA. Celebrating over 30 years, it offers two challenging distances: a 25k trail run and a 50k ultra, featuring steep climbs and rugged terrain with ove..

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 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 Tamalpa Headlands 50K is a challenging ultramarathon held annually in Marin County, California, near San Francisco. The single-loop 50-kilometer course features approximately 6,500 feet of elevation gain and includes iconic trails such as Coastal, Miwok, Steep Ravine, Matt Davis, and Dipsea. Run..

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..

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

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..