Trail Running calendar near Vacaville 2026-2027

Experience a trail run across the forest and hills of Angel Island with views of San Francisco and the Golden Gate. Choose from multiple race distances including a youth dash and enjoy a picnic at Ayala Cove.

Point to point half marathon from Almaden Quicksilver County Park to the top of Mt. Umunhum, gaining about 4,767 feet. The course has aid stations and toilets, marked sections and a six hour time limit.

A three-day trail running weekend in Marin County with **28K**, **50K**, and a new point-to-point **100K**, fully managed courses that summit local high points and include live tracking, staffed aid stations, and a central staging area at M..

A multi-distance trail event on March 22, 2025 at Calero County Park in San Jose offering runs from a kids race to a 50K, single track and dirt-road courses, multiple aid stations, and per-distance time limits.

Multiple trail distances run through Redwood Regional Park on March 20, 2027 at Chabot Space & Science Center. Routes use East Ridge, West Ridge, Stream and Bridle trails and distances were measured with a Rolatape surveyor's wheel.

A backyard ultra at Dry Creek Parkway where runners complete repeated 4.16 mile loops each hour until one runner completes the most yards. The event is affiliated with the Backyard circuit and can lead to national and world championship opp..

A spring trail race at Pueblo Day Use Area in Santa Teresa County Park on April 5, 2025 offering 5K, 10K, 10 Mile and a half marathon across marked, hilly trails with aid stations and a four hour half marathon limit.

Multi-distance Spartan obstacle weekend in Stanislaus County, CA on April 3-4, 2027. Options range from a 5 km sprint to a 50 km ultra, plus a kids race, across trail terrain with signature obstacles.