Trail Running calendar near Vacaville 2026-2027

The Sludge Trudge 5K is a paved run/walk at North Natomas Regional Park. It's a sanctioned event with professional timing and awards for top finishers. The event is hosted for a specific community group and their guests.

Experience a scenic trail run around Angel Island with panoramic views of the Golden Gate Bridge and San Francisco. This event features a hilly loop course for both Half Marathon and 10K distances with ferry transport included.

Experience California wine country at this premier trail festival featuring a Western States Qualifier 100K, a scenic 50K, and a women-only half marathon around the beautiful shoreline of Lake Sonoma.

Trail races at Lake Chabot Regional Park in Castro Valley range from a 50 yard kids dash to a 50K ultradistance. The routes circle the reservoir and surrounding hills and distances were measured with a Rolatape surveyor's wheel.

A women focused 10K in Auburn on April 11, 2026 featuring scenic trail loops, finisher shirts, age group awards and a raffle with four winners earning a trip to a women only running camp in Spain.

Explore the rolling hills of Cronan Ranch at the Magnolia Magic River Trail Run. This event offers a range of distances on dirt and rock trails, from a 5K to a 50K ultra. All participants receive a medal and access to aid stations along the..

A mountain trail event in Calistoga offering 10K to 50K courses that mix fire road and technical single-track, with multiple aid stations, on-mountain logistics, and UTMB Index status for several distances.

Experience a scenic trail run along the San Francisco coast with views of the Golden Gate and Pacific Ocean. This five kilometer event awards ribbons to all finishers and top category performers.

On April 18, 2026 Outlands offers 25K, 50K and 50 mile trail courses near Pilot Hill, CA along Folsom Lake with runnable singletrack, steady climbs and stocked aid stations.

Experience the hills of Del Valle Regional Park in Livermore with a flat 5K or hilly 10K and half marathon. All participants receive a custom medal and t-shirt with professional chip timing included for all distances.

Experience the coastal beauty of the Bay Area Ridge Trail with distances ranging from a 50 yard dash to a 50K ultramarathon. Runners enjoy expansive views of the Pacific Ocean and the Santa Cruz Mountains.

Run through the beautiful trails of Trione Annadel State Park in Santa Rosa. This eco friendly event offers a half marathon, 10K, and 5K to support local park conservation and stewardship.

Experience a technical trail race through the scenic parks of San Carlos. Choose from four distances including a 15K long course and a dedicated kids run to support local trail maintenance.

Trail races in Huddart County Park and Purisima Creek Redwoods on April 18, 2026 offering 10K, half, 35K and 50K across technical single-track and fire roads, with chip timing, cupless aid stations, and significant elevation gain.

Join a free, inclusive community trail run on the beautiful Marin Headlands trails. Choose from short, medium, or long unmarked courses and enjoy a post-run meal with giveaways from key running brands. The event fosters connection before th..

Trail races in the Sierra Azul Open Space Preserve near Mt. Umunhum, offering distances from 5K to 50K on out and back routes. Courses are marked with pink ribbons and supported by staffed aid stations with drop bag service for longer event..

The Presidio Community YMCA hosts the 14th annual Presidio Trail Run on April 19, 2026, with 10K, 5K and 1.5 mile courses through the Presidio. Entry fees support YMCA community programs and a signed waiver is required.

A multi distance trail event in Auburn California from 23 to 26 April 2026 following sections of the Western States Trail. Distances include 161 km, 100 km, 50 km and 25 km and the 100 km awards Western States Golden Tickets.

Run along the scenic coastal ridge of Mt Tamalpais State Park in this 38th annual event. Choose between a half marathon or 10K featuring single track trails and views of the Pacific Ocean.

Trail races inside Marshall Gold Discovery State Historic Park range from a Kids Run to a half marathon on varied singletrack and paved sections, with marked courses, aid stations, and notable elevation gains.