Trail Running Calendar California 2025-2026

The Montana de Oro Trail Run is an annual event held at Montaña de Oro State Park in Los Osos, California. Participants can choose from various distances, including a 50K, 36K, half marathon, and 12K, each offering stunning views of the Pacific Ocean and the surrounding landscape. The event features..

The Terrible, Horrible, No Good, Very Bad Day 50K is a unique trail running event set for March 29, 2025, in Los Gatos, California. This non-supported, fatass run features challenging options, including a 50K with 10,900 feet of elevation gain, a 30K fun run, and a 10-mile Puppymeat run. Participant..

The Western Pacific event features a half marathon, 10K, and 5K, taking place in Fremont, California. Organized by Brazen Racing, this race utilizes the historic Western Pacific Trail, known for its flat and fast terrain, making it ideal for runners and walkers of all levels. The courses primarily c..

The Rattlesnake Dick event features a thrilling series of races including a 50K, 25K, and 10K, set in Cool, California. Participants can enjoy a generous 10-hour cut-off for the longer distances, with all finishers receiving a stylish event shirt and a high-quality finisher's medal. The race is desi..

The Folsom Lake Falcon Crest Trail Run, scheduled for March 29, 2025, takes place in the scenic foothills of El Dorado Hills, California. Participants can choose from various distances, including a 5K, 10K, 8-mile, and half marathon, all set on beautiful single-track trails that offer a mix of fast..

The Lag Bon 10K is a trail running event taking place in Fairfax, California, on March 30, 2025. This moderately challenging course features beautiful trails around Marin County's pristine reservoirs, with an elevation gain/loss of approximately 400 feet. The event aims to raise funds and awareness..

The Beyond Limits Ultra (BLU) is a unique multi-day running event held at Pathfinder Ranch in Mountain Center, California, from April 2 to 6, 2025. Celebrating its 13th year, BLU offers various race options, including 72-hour, 48-hour, 24-hour, 100-mile, 50-mile, and 50K races. Participants enjoy on..

The Ruth McKenzie Preserve Half Marathon, along with a 10k, 5k, and kids' races, is set to take place on April 5, 2025, in Clovis, California. This event features a variety of race distances catering to participants of all ages and skill levels, including a half marathon, 10k, and 5k runs/walks, as..

The Santa Teresa King Richard Annual Trail Run is a cherished event held at Santa Teresa County Park in San Jose, CA, designed to honor the legacy of Richard Limb. Participants can choose from various distances, including a half marathon, 10-mile, 10K, and 5K, all set against the park's stunning lan..

The Diablo Trails Challenge is a running event taking place on Mount Diablo, featuring various distances including a 50K, half marathon, 10K, and 5K. Scheduled for April 5, 2025, this challenge caters to runners of all experience levels, from beginners to seasoned ultra-runners. A portion of the ent..

The 40th Nature Made Great Race is a premier running event taking place in Agoura Hills, California, featuring a variety of race distances including a Half Marathon, 5K, 10K, 15K, 10M, and a 1M fun run. Established in 1986, this event is celebrated for its scenic courses and has received numerous ac..

The Point Mugu Trail Run is an exciting springtime event held at Point Mugu State Park, featuring a challenging Half-Marathon and a scenic 10k trail race. The course begins at the Ray Miller Trail, offering stunning ocean views as it ascends through switchbacks and descends into Sycamore Canyon, cul..

The Bedrock Valley Trail Runs is an exciting trail running event taking place in Hemet, California, on April 5-6, 2025. This family-friendly event features a variety of races, including a Trail Marathon, Half Marathon, 15k, and multiple 5k options, as well as a unique Stroller Trail 5k and a Kid's 1..

The Golden Gate Headlands Marathon, Half Marathon, and 10K is a scenic running event taking place on April 5, 2025, in the Marin Headlands, California. Celebrating its 40th annual edition, the race offers participants breathtaking views of the Golden Gate Bridge, San Francisco Bay, and the Pacific O..

The American River 50 Mile Endurance Run is one of the largest and most prestigious 50-mile races in the United States, attracting both seasoned runners and newcomers. Set against the stunning backdrop of Northern California, the race follows the American River Parkway from Folsom to Auburn. Partici..

The Rock It in El Moro Canyon 6K & 10 Miler, presented by Fitness on Fire, is an exciting trail running event set in the scenic El Moro Canyon, Laguna Beach, California. Participants can choose between a 6K or a 10-mile course, both featuring challenging climbs and breathtaking views of the Pacific..

The Annadel Half Marathon, along with its 10K and 5K events, is a prominent non-profit fundraising race held in Sonoma County. Over the past 14 years, it has successfully raised funds to enhance the beauty of Annadel State Park. The challenging Half Marathon course features over 1,500 feet of elevat..

Leona Divide is an exciting running event taking place in Lake Hughes, California, featuring multiple race distances including 100 miles, 100 kilometers, 50 miles, 50 kilometers, and 30 kilometers. Scheduled for April 12, 2025, this event serves as a qualifier for the prestigious Western States 100..

Outlands is an exciting endurance race set to take place on April 12, 2025, at Peninsula Campground in Pilot Hill, California. Participants can choose between two challenging distances: a 50K and a 50-mile race, both designed to showcase the stunning trails and natural beauty surrounding Folsom Lake..

The Porterville 5K/10K Trail Run, organized by the Porterville Military Academy, is set to take place on April 12, 2025. This community event features a 5K and 10K run/walk along a dirt path course, as well as a children's 1/4 mile run/walk. Participants in the 5K and 10K will receive a custom race..