Trail Running Calendar California 2025-2026

The Kokanee Trail Runs, held annually in South Lake Tahoe, California, is a scenic running event featuring a half marathon, 10K, 5K, and a non-competitive half-mile Tadpole Trot for children 12 and under. The courses showcase stunning views, with the half marathon traversing Tahoe Mountain and overl..

The Yuba Gold Trail Runs take place near Nevada City, California, in the scenic gold country region. The event offers multiple distances including a 50K, 35K, and half marathon, all featuring beautiful views of the South Fork Yuba River and the historic Malakoff Diggins hydraulic mining site. The st..

Run by the Sea is an annual running event held at Wilder Ranch State Park in Santa Cruz, California. Scheduled for October 5, 2025, the race offers three distances: a 4K run/walk, a 12K run, and a half marathon. The courses primarily feature flat, packed dirt trails that wind along the scenic coasta..

The Spooner's Cove Trail Run, held at Montana de Oro State Park in Los Osos, California, offered scenic trail running with views of rugged cliffs, sandy beaches, and the ocean. The event featured multiple distances: an 8K with minimal climbing along the bluff, a 13K ascending the 1,347-foot Valencia..

The HOKA Kodiak Ultra Marathons by UTMB is a challenging alpine trail running event held in Big Bear Lake, California, a rustic mountain town near Los Angeles. The race spans two days with five distances ranging from 10.4 km to 159.3 km, featuring significant elevation gains up to 4100 meters. Runne..

The Mile Madness Endurance Run is a multi-day ultrarunning event held at Sunset Whitney Recreation Area in Rocklin, California. The course is a professionally measured 1.05-mile loop featuring 85% dirt trail and 15% paved path, with about 62 feet of elevation gain per lap. Runners can choose from va..

The Carmel Valley Trail Race, held annually at Gonzales Canyon Open Space in San Diego, offers a scenic and challenging trail running experience. Starting and finishing at Solana Ranch Park, the race features flat sections at the beginning and end, with elevation gains concentrated in the middle, in..

Live Oak Odyssey is a fixed-time trail running event held at O'Neill Regional Park in Trabuco Canyon, California. Participants choose between 3-hour and 6-hour races on a scenic 2.75-mile loop featuring approximately 500 feet of vertical gain per lap. The course offers a mix of uphills, downhills, s..

The Mt. Umunhum Trail Conquest-Fall is a trail running event held at Almaden Quicksilver County Park in San Jose, California. The race offers multiple distances including a 5K, 7 Mile, Half Marathon, 30K, Trail Marathon, and 50K.The longer courses venture into the scenic Sierra Azul Open Space Prese..

The Euchre Bar Massacre is a challenging fatass-style trail run held near Foresthill, California, starting and finishing at Shirttail Creek Campground. It offers two distances: a 25-mile course with approximately 10,000 feet of climbing and a 50-mile course with about 20,000 feet of elevation gain...

Go Wild Marin 4 Hr is an adventurous trail and wilderness scramble held on the Tiburon Peninsula in Corte Madera, California. Participants compete individually or in teams of up to five, using a custom map to locate as many as 24 checkpoints scattered across trails and wild areas within a four-hour..

The Napa Lapa Trail Adventure, hosted by Inside Trail Racing, is a unique time-based trail running event held at Skyline Wilderness Park in Napa, California. Instead of racing a fixed distance, participants run as far as possible within 3, 6, or 12-hour time limits on a challenging 4.16-mile loop fe..

Rock It in Chino Hills is a trail running and hiking event held at Chino Hills State Park in Brea, California. Participants can choose between a 5K or 10K course, both offering scenic views and tranquil natural surroundings with trails extending across the expansive park. The event emphasizes the be..

Granite Head 2025 is a trail running event held in Granite Bay, California, featuring two challenging courses: a 6.6-mile short course and an 11.2-mile long course. Both races start and finish at Granite Beach, offering scenic trail running experiences. Participants receive a unique tech shirt and e..

The Bizz Johnson is a scenic trail running event held in Susanville, California, featuring distances of 50K, marathon, half marathon, 10K, and an Express Half Marathon with a relay option. The USATF-certified marathon course is a fast, mostly downhill route along the historic Bizz Johnson Trail thro..

The Ruth Anderson Memorial Endurance Run is an ultradistance race held annually in San Francisco, California, at scenic Lake Merced. The course features a mostly flat, USATF-certified 4.48-mile loop around the lake, combining asphalt paths and groomed dirt shoulders with about 100 feet of elevation..

The John Lawson Tamalpa Challenge is a cross-country running event held annually at China Camp State Park in San Rafael, California. The 2025 edition features three races, each approximately 4.2 miles long, primarily on rolling single-track trails with a short stretch on asphalt. The event honors Jo..

The Jackalope Lope is a trail running event held at Whiskeytown National Recreation Area near Redding, California, known for its challenging terrain and significant elevation gain. Participants can choose from three distances: an 8.5-mile run, a 20.5-mile race, or a new 50-kilometer course. The even..

The Diablo Summit Stomp is a trail running event held in Walnut Creek, California, featuring distances of 30K, half marathon, 10K, and 5K. The courses traverse dirt trails starting from Castle Rock Park and extend into Mount Diablo State Park, with the 30K reaching the summit of Mount Diablo. The ev..

The John Wayne Grit Series - Lone Pine is a scenic running event held in Lone Pine, California, featuring a half marathon and 10K race through the Alabama Hills National Scenic Area. The course includes dirt roads, single-track trails, hills, and stunning views of Mt. Whitney at an elevation of 3,70..