Trail Running calendar near Monterey County 2026-2027

Live and virtual 5K, 10K and half marathon at Lake Chabot Regional Park in Castro Valley, June 26 to 29, 2026. Courses mix paved and trail sections with aid stations; live participants receive a shirt, handcrafted woodallion and beer sample..

Trail races in Santa Cruz through ancient coastal redwoods and varied terrain, offering distances from a free kids quarter mile up to a 50K. Marked courses, fully stocked aid stations every 6 to 7 miles, and a cupless policy.

One of America's oldest 50k races loops through East Bay parks. It's known for strong community support and a post-race plant-based BBQ. The event happens every August at Lake Chabot Marina.

Trail races at Sprig Lake Day Use Area in Gilroy on August 8, 2026 feature 5K, 10K and half marathon routes with significant elevation gain; proceeds fund local scholarships to a national trail running camp.

Trail races of 30K, half marathon, and 10K run through Henry Cowell Redwoods State Park with redwood forest, river crossings, ocean breezes, and aid stations every 5 to 6 miles.

Trail run in Huddart Park near Woodside, California on August 30, 2026 offering distances from 8K to 50K plus a free kids 50 yard dash. Courses run on single track and dirt roads with aid stations every 5 to 9 miles.

This trail run and camp event takes place in Bradley, California. Runners can choose from distances including a 48-hour, 24-hour, 20km, or 10km race.

Trail running on a private California cattle ranch. Choose from 5km to 48 hour distances on a dirt loop course. Camp under the stars with nightly bonfires and music.

A multi distance trail event at Lake Chabot Regional Park in Castro Valley featuring a 100k, a 50 mile, and a marathon. All races are UTMB Index events and the 50 mile is part of the Pacific USATF Grand Prix.

The Big Sur Trail Marathon will take place in Monterey County on Saturday 26 September 2026. You can run between 5 and 26 miles.

Explore the shaded redwood groves and challenging, flowy singletrack of Sanborn County Park. This trail event on September 27, 2026, offers 10k, half marathon, and 50k distances through the Santa Cruz Mountains.

Scenic coastal races at Wilder Ranch State Park on October 4, 2026. Options include a Half Marathon, a 12K, and a 4K run and walk along mostly flat packed dirt trails.

A Halloween-themed running event at Hellyer County Park offering distances from a kid's 50 yd dash to a certified marathon, with costume prizes, aid stations every 2-4 miles, and cupless hydration policy.

Mermaid Trail Run at Huddart Park in Woodside on November 7, 2026 features multiple trail distances, a timed 6 Hour challenge and a youth dash. The course is hilly, parking has a cash fee and a pancake breakfast follows the race.

A multi-distance trail event around Lake Chabot in Castro Valley on November 7, 2026, offering 8K to 50K options plus a free kids' dash, marked trails, regular aid stations, and a cupless policy.

Trail navigation event in Santa Cruz where solo runners or teams use a custom map to find up to 20 checkpoints in 2 or 4 hour formats; a finish area offers refreshments and social time.

A Thanksgiving morning event in San Jose offering 5K, 10K, a USATF certified half marathon, age-group races and a free kids' 50-yard dash. The course is mostly asphalt, aid stations appear every 2 to 4 miles, and the event is cupless.

Start a new Thanksgiving weekend tradition at Quarry Lakes Regional Park. Choose from a fast half marathon, 10K, or 5K on beautiful trails, or let the kids run free in the Little Turkeys sprint. Bring a canned good to support the local food..

A multi-distance trail event at Quarry Lakes Regional Recreation Area in Fremont featuring 5K, 10K, youth races, and a USATF-certified half marathon along Alameda Creek Trail with crushed-rock surfaces, cupless aid stations, and awards for..

Run through the redwoods and pines of Sanborn County Park. Choose from a half marathon, 10K, or 5K on scenic single-track trails. Walkers are welcome and all finishers get a medal.