Trail Running calendar near Fairfax 2024-2025

The Napa Valley Endurance Run is a challenging trail running event held in Calistoga, California, featuring four race distances: 50K, 35K, half marathon, and 10K. Participants traverse the scenic Robert Louis Stevenson State Park, with routes that include steep climbs and technical trails, offering ..

The Sierra Azul Trail Challenge is a premier running event held in the scenic Sierra Azul Open Space Preserve near San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 20 Mile, Half Marathon, 7 Mile, and 5K, making it suitable for runners of all levels. The ..

The Miwok 100K is a renowned trail ultramarathon set in the stunning landscapes of Marin County, California. Known for its challenging course featuring 11,800 feet of elevation gain, runners are treated to breathtaking views of iconic landmarks such as the Golden Gate Bridge and Mount Tamalpais. The..

The Hacienda Hills Trail Run - Spring, held at Almaden Quicksilver County Park in San Jose, CA, offers a thrilling day of trail running with nine different race distances, including a 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, 5K, Mile, and a Kids Run. Participants can enjoy stunning Bay ..

The Grizzly Peak Trail Run, scheduled for May 10, 2025, in Berkeley, CA, offers a variety of running events including a 10K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. The race starts at Lake Anza and winds through the scenic Tilden Regional Par..

Run for Amma is an annual charity running event held at Skyline Ridge Open Space Preserve in Los Gatos, California. The event features three race distances: 50K, 30K, and 10K, with all proceeds benefiting the UCSF Julia Carnevale Lab for cancer research. Participants can enjoy scenic trails while co..

The 13 Mile Trail Race Top Down is a half marathon event taking place in San Jose, CA, within the scenic Almaden Quicksilver Park and Sierra Azul Open Space Preserve. This inaugural race features a point-to-point course, with transportation provided to the starting point at Mt. Umunhum.Participants ..

The Napa Wilderness Trail Runs, hosted by Bay Trailrunners at Skyline Wilderness Park, offers a variety of trail running distances, including 40-mile, 50K, 30K, half marathon, and 10K options. This event caters to all levels of runners, from seasoned ultra-marathoners to beginners. Participants can ..

The Sonoma Coast Trail Runs, organized by SkyBreaker Racing, offers a scenic running experience through the stunning trails and fire roads of Sonoma Coast State Park in Northern California. Participants can choose from various distances, including a 50K, Trail Marathon, 30K, and Half Marathon. The c..

The Calero Trail Run - Spring, held at Calero County Park in San Jose, CA, offers a variety of distances including 50K, Marathon, 25K, Half Marathon, 15K, 10K, 5K, and a Kids Run. Participants can enjoy scenic single-track trails, challenging hills, and dirt paths, making it an excellent training op..

The Cinderella Trail Run, scheduled for June 1, 2025, in Oakland, CA, offers a variety of race distances including an 8K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. The scenic course winds through Joaquin Miller and Redwood Regional parks, featu..

The 2025 Lake Chabot Trail Challenge features a Half Marathon and a 5K run, taking place in Castro Valley, CA. This annual event, now in its 41st year, is popular among trail runners and offers scenic courses with views of Lake Chabot and surrounding landscapes. The Half Marathon is a hilly loop pri..

The Mt. Umunhum Ultras is an exhilarating trail running event set in the scenic landscapes of San Jose, CA. Participants can choose from various distances, including a challenging 52-mile ultra, a 50K, and a trail marathon, all featuring over 15,000 feet of elevation gain.The course winds through en..

The SF Half Day is a unique running event taking place in San Francisco, featuring various race durations including 12-hour, 6-hour, and 3-hour options for both solo runners and teams. Participants will run on a scenic one-mile loop at Crissy Field, offering stunning views of the Golden Gate Bridge ..

The Rancho Hills Trail Run - Summer is an exciting running event set in the picturesque Rancho Cañada del Oro Open Space Preserve in Morgan Hill, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 30K, Half Marathon, 10 Mile, 8 Miler, 10K, and 5K. This challenging c..

The Calero Hills Trail Fest, held at Calero County Park in San Jose, CA, offers a variety of trail running distances including a marathon, 30K, half marathon, 10 miler, 10K, and 5K. Participants can expect a challenging course featuring single track trails, steep ascents and descents, and scenic vie..

The Skyline 50K Endurance Run, held at Lake Chabot Marina in Castro Valley, CA, is one of the oldest continuously running 50K races in the United States. This event, taking place each August, features a scenic loop course through the East Bay Regional Parks, making it ideal for both first-time ultra..

The Redwood (Summer) Trail Run is an exciting running event taking place in Oakland, CA, featuring a variety of distances including a 5-mile run, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and younger. Set against the stunning backdrop of Redwood Regional ..

The Almaden Hills Trail Run takes place in the scenic Almaden Quicksilver Park, featuring a variety of challenging distances including 5K, 10K, 8M, Half Marathon, 30K, Trail Marathon, and 50K. The course consists of 60% dirt roads and 40% single track, offering stunning views and a hilly terrain tha..

The Tamalpa Headlands 50K is a challenging ultramarathon set in the scenic Marin County, California, featuring a single-loop course that showcases iconic trails such as Coastal, Miwok, and Dipsea. Established in 1998, this event offers approximately 6,500 feet of elevation gain, combining fast fire ..