Trail Running calendar near Redwood City 2026-2027

A map-based navigation event in Fillmore and Japantown on August 22, 2026 where individuals or teams of up to five follow a custom map to 20 to 30 checkpoints across 5K and 10K courses, then enjoy refreshments at the finish.

Tackle the legendary Double Dipsea, a 13.7-mile out-and-back on the historic Dipsea Trail from Stinson Beach. This unique race features a handicapped start, putting all runners on a single-track course of constant passing. Experience the hi..

A two loop 4.15 mile cross country race on the fire roads of the UC Santa Cruz campus, starting and finishing at the meadow above the fire station and included in the Pacific Association USATF Grand Prix series.

Obstacle-course weekend at Mahon Ranch near Elk Grove on Aug 29-30, 2026, featuring Sprint (5 km), Super (10 km), a kids race, spectator access, team entries, and service member discounts.

Trail races at Huddart Park, King's Mountain and Bear Gulch offer measured distances from a 50 yard kids dash to a 50K, with fees listed per distance and registration opening November 11, 2025.

A loop trail race around Angel Island near Tiburon offering a 10K single loop and a half marathon that repeats the loop. The course has panoramic Bay Area views, a 400 runner limit, and a mandatory ferry to the island.

A steep 4.75 mile up and down run, hike, or walk on San Anselmo's Bald Hill that finishes downtown with live music and a t shirt. The third annual event benefits local nonprofits and includes town endorsement.

The inaugural Apple City 5k at Pinto Lake County Park in Watsonville on 30 August 2026 offers a 5k on gentle, scenic trails and a kids 1k around the soccer fields. Half the event funds support the Pajaro Valley Education Foundation.

A PA/USATF cross country race of 3.4 miles at Spring Lake Regional Park in Santa Rosa on August 30, 2026. The 33rd annual Empire Open features rugged dirt trails, three races including a masters division, and a $1,500 prize purse for USATF..

Experience the natural scenery of Mount Diablo State Park through a variety of trail races. Runners can select distances ranging from 4 miles to a 50K with spectacular views of the San Francisco Bay Area.

A 6.45 miles trail race in Annadel State Park organized by the Empire Runners Club, held in early September with staggered age and gender starts, limited to 100 runners and awards for the top 13 finishers.

Experience the trails of China Camp State Park with a selection of distances including a 5K 10K and Half Marathon. Participants enjoy a post race festival with beer steins custom medals and local snacks.

Trail races in Tilden and Wildcat Canyon near Berkeley with 10K, half marathon, 35K and 50K options, aid stations every 5 to 7 miles, a cupless format, and a 350 runner capacity.

Trail races at Stevens Creek Reservoir in Cupertino on September 12, 2026 include a half marathon, an 11K, and a charity 2.5 mile Lollipop Loop. Courses use shaded single track and ridge views with aid stations and a post race BBQ.

A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.

Rocky Ridge is a trail running event at Las Trampas Wilderness in San Ramon, California on September 19, 2026. It features a half marathon plus 10K and 5K courses with uphill trail sections and scenic vistas.

A trail 5K at San Pedro Valley Park on September 20, 2026, with a kids run and member picnic. The course features an uphill switchback first mile, scenic mid-mile views, and a flat fast final mile.

A multi-distance trail event at Lake Chabot Regional Park offering a Bay Ridge 100k, Firetrails 50 mile, and Golden Hills Marathon with UTMB Index status, published time limits, and finisher awards.

A trail race at Andrew Molera State Park on September 26, 2026 offering marathon, half marathon and 5-mile options along Old Coast Road. The event is limited to 300 participants and features marked aid stations and coastal views.

A community ultramarathon and hike on a 3.3 mile loop at Skyline Wilderness Park in Napa supporting the Pheo Para Alliance. Participants can do one to ten loops with alternating loop directions each hour and on site aid and awards.