Trail Running calendar near Saratoga 2026-2027

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 weekend in Marin County offering a point to point 100K plus single loop 50K and 28K that summit Loma Alta and Big Rock Ridge.

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 takes place March 27, 2027 at Quarry Lakes Regional Recreation Area in Fremont, California, offering a half marathon, 10K and 5K on a mostly flat course that follows the historic Western Pacific Trail.

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.

A multi-distance Spartan obstacle weekend at Modesto Reservoir Regional Park in Waterford, CA. Races include Sprint 5 km, Super 10 km, Beast 21 km and Ultra 50 km with 20 to 60 obstacles plus a kids race.

Trail running event in Walnut Creek on April 3, 2027, offering 50K, half marathon, 10K and 5K. A portion of entry fees supports Save Mount Diablo; remote runner and BBQ options are available.

A trail event at Skyline Ridge Open Space Preserve offering distances from a 50 yard kids dash to a 50K race. Routes run largely on the Bay Area Ridge Trail with ocean and Santa Cruz Mountains views.

Badger Cove is a running event in Livermore, CA on April 17, 2027 offering a half marathon, 10K, 5K and a hiker division. Registration opens January 1 and closes February 2 with fees varying by event.

A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.

No Foolin' Foot Race in San Carlos on April 24, 2027 offers 15K, 10K, 5K and a 1K kids trail course across Big Canyon, Eaton and Pulgas Ridge, with proceeds supporting local open space trail maintenance.

Trailquake in Saratoga on Mother's Day offers 5K, 10K, a half marathon and a hiker division on redwood and pine forest trails. Finishers receive custom medals and shirt options.

Trail runs at Skyline Wilderness Park in Napa on May 15, 2027 offer four distances from 10K through 50K on reworked trails with significant elevation. Aid stations are staffed, the event is cupless, and camping is available through the park..

A multi-loop trail event in Napa that uses Skyline Wilderness Park and Suscol Headwaters. Options include an approximately 50 mile solo route and a one-loop ~25 mile course, with cupless aid stations and limited crew and pacer access.

A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.

Run for Amma is a charity trail event at Skyline Ridge Open Space Preserve in Los Gatos on May 22, 2027. Distances include 50K, 30K and 10K and 100% of registration proceeds go to UCSF cancer research.

Obstacle course races at Toro Park near Salinas include a Sprint (5 km), Super (10 km) and kids events across wooded trails and rolling hills, plus spectator options and team registration.

Trail races of 10K, half marathon, and marathon at Toro Park, Salinas on May 30, 2027, over rocky trails and dirt roads with summer temperatures around 16ºC and an average altitude of 520 meters.

A point-to-point 100-mile race on June 12, 2027, from California Memorial Stadium to Skyline High School, covering about 18,000 ft of vertical gain with a 33-hour time limit and varied terrain through ridgelines, redwoods, and lake shore.