Trail Running calendar near Monterey County 2026-2027

Run through the Skyline Ridge Open Space Preserve on a scenic course featuring coastal views and gentle hills. All proceeds and matched entry fees support medical aid programs via The Hatuey Project.

Run a flat and fast course on the historic Western Pacific Trail in Fremont. Choose from a half marathon, 10K, or 5K starting at Quarry Lakes. The event is open to runners and walkers of all levels.

Run along the scenic Pacifica coastline in the Mori Point 7K. This event features a flat course through the Mori Point National Recreation Area using a mix of trails and paved paths.

Multiple marked trail distances circle Lake Chabot reservoir in Castro Valley, from a free 50 yard kids dash to a 50K. Aid stations occur every 4 to 5 miles and the event operates cupless, so bring a personal cup or soft flask.

Run the scenic trails at Lake Del Valle Regional Park in Livermore. The Badger Cove event offers a Half Marathon, 10K, and 5K on April 18, 2026, with walkers and hikers welcome. The half marathon is part of a challenging trail series.

Explore the scenic Bay Area Ridge Trail at the Horseshoe Lake Trail Run. Choose from a 5-mile run to a 50K ultramarathon on marked trails through multiple open space preserves. The event is cupless, offers aid stations, and all finishers ge..

A trail running event in San Carlos on April 18, 2026 offering 1K kids, 5K, 10K and a new 15K with substantial climbing through Big Canyon Eaton and Pulgas Ridge. Festival atmosphere at Crestview Park with timed results and awards.

Explore the forested trails of Huddart Park and Purisima Creek Redwoods on the San Francisco Peninsula. Choose from four distances, from a 10K to a 50K, on courses featuring redwood canyons and ridge-line views. All finishers get a custom m..

Experience the protected landscapes of Palo Corona Regional Park through a variety of trail distances. Support land conservation in Monterey County while enjoying scenic views normally closed to the public.

Quicksilver Endurance Runs The Quicksilver Endurance Runs is a trail running event in its 41st edition. The event features two races with significant elevation gain. The 100K race has approximately 13,000 feet of elevation gain and is a Wes..

Celebrate the 24th year of this community event in Los Altos Hills. Run or walk through the Westwind Community Barn and Byrne Preserve on hilly 5K, 10K, or 1 mile courses.

Trailquake 2026 invites runners to the forested trails of Saratoga, California. Choose from a 5K, 10K, or half marathon course beneath the redwoods and pines. The event is scheduled for a Sunday in May.

Celebrate Mother's Day on May 10th with a family-friendly run or walk. The event, held at Pinto Lake County Park, features a 1K kids run, 5K, and 10K. Your participation benefits Pajaro Valley Shelter Services.

Run for Amma is a 15th-anniversary charity trail run supporting cancer research at UCSF. The event features 50K, 30K, and 10K distances through Skyline Ridge Open Space Preserve. All registration proceeds go directly to fund cutting-edge ca..

Experience a scenic run through Coyote Point Recreation Area with a 5K or 10K event supporting mental health. Enjoy a free community wellness fair featuring local health vendors and family friendly activities.

The Toro Park Trail Run offers 10K, half marathon, and marathon distances on the rocky trails and dirt roads of California's Toro Park. The summer event features rolling golden hills and oak trees. It is held as part of a Spartan festival w..

A trail event in Castro Valley on June 7, 2026 offering a chip timed half marathon and 5K with on-course water, first aid support, guaranteed t-shirts for early registrants, and age division awards.

Experience a scenic 5K or 10K run or walk through the flat dirt trails and green hills of Henry W. Coe State Park in Gilroy.

Explore the golden summer trails of Fort Ord National Monument. This trail run offers four distances across rolling hills and diverse terrain. It's a cupless event with aid stations stocked with fuel and drink.

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..