Trail Running calendar near Santa Cruz 2026-2027

Trail races of 10K, Half, 35K and 50K through redwood forest and single-track in Huddart and Wunderlich County Parks, with marked courses, cupless aid stations, and an 8 hour limit for the longest distances.

Brazen Racing stages a trail event at Lake Chabot in Castro Valley on December 31, 2026 offering half marathon, 10K and 5K options. Hikers and walkers are welcome and free photos and race results are provided.

A family-friendly 5K, 10K and half marathon around Lake Chabot in Castro Valley on January 1, 2027. The half marathon is part of the Brazen Ultra Half Series and includes varied trail terrain with notable climbs.

A winter trail event at Almaden Quicksilver County Park offering distances from a kids run to a 50K, marked dirt-road courses, aid stations with toilets, drop-bag service for longer races, and measurable elevation gain.

Join a community run and walk along the scenic trails of the Tuolumne River Regional Parkway in Modesto. Support the Sole Support Sponsorship Program while completing a 5K course alongside friends and family.

Crystal Springs Trail Run on January 17, 2027 in Woodside California offers distances from an 8K to a 50K plus a free kids 50yd dash. Routes run through Huddart Park, King's Mountain and Bear Gulch with marked trails and regular aid station..

Run through the towering redwoods and lush ferns of Huddart Park in Woodside. This trail event offers multiple distances from a five mile race to a 50K ultramarathon plus a free dash for children.

A trail running event in San Francisco on January 23-24, 2027, offering 15K, 25K, 50K and 50 mile options on soft, hilly trails. The course travels through the Marin Headlands and crosses the Golden Gate Bridge with coastal views.

Runs along the bay at Coyote Hills Regional Park in Fremont include a half marathon, 10K and 5K on mostly flat courses with mixed surfaces and boardwalks through marsh areas. Walkers are welcome.

Experience the coastal beauty of the Marin Headlands at the Golden Gate Trail Run. Choose from distances ranging from a 50K trail race to a fun kids dash with views of the Golden Gate Bridge and San Francisco.

Trail races from a kids run up to 50K at Almaden Quicksilver Park with marked out and back courses, staffed aid stations, and summit options on Bald Mountain and Mt. Umunhum.

Scenic races at San Leandro Marina on February 13, 2027 feature a half marathon, 10K and 5K along a mostly-flat bayside trail with waterside views; walkers and hikers are welcome and volunteer photographers provide free photos.

Montara Mountain Trail Run on February 20, 2027 in San Pedro Valley Park offers distances from a free 50 yard kids dash to a 50K, with marked trails, cupless aid stations every 6 to 7 miles, and substantial elevation gain on many courses.

Trail races in Sanborn County Park on mostly single track, technical forest trails with multiple distances, significant elevation gain, marked courses, and full aid at key points.

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.

A point to point half marathon to the summit area of Mt. Umunhum on March 8, 2025, covering about 13.35 miles with 4,767 feet of ascent, marked mainly by pink ribbons and supported by aid stations with toilets.

A three-day trail running event in Marinwood, California on March 19 to 21, 2027 offering 100K point to point and 50K and 28K single-loop courses that summit many of Marin County’s high points with broad bay area views.

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.

Western Pacific 2027 at Quarry Lakes Regional Recreation Area in Fremont offers Half Marathon, 10K and 5K races on a mostly flat course along the historic Western Pacific Trail. A remote runner option is also available.