Trail Running calendar near Modesto 2026-2027

An annual August trail event from Lake Chabot Marina offering a 50 km and a half marathon with volunteer aid stations and a plant-based finish festival.

A trail running event on Aug. 8, 2026 in Gilroy, California through redwood groves and peak viewpoints. Distances include a 5K, 10K and half marathon with significant elevation gain, and proceeds support youth scholarships.

Bear Creek on August 8, 2026 offers 5K, 10K and a 13.32-mile half marathon in the Briones Regional Park area, with a virtual Remote Runner option. Entry windows and fees are listed for each race.

50th annual Pinecrest Run in Pinecrest, CA: five-mile and one-mile courses along Pinecrest Lake, held as a fundraiser for Pinecrest Expedition Academy.

Experience the trails of Redwood Regional Park in Oakland. Runners can choose from distances ranging from a 50 yard kids dash to a 50K ultramarathon through scenic ridge lines and redwood groves.

Trail races on hilly mixed dirt and single track at Almaden Quicksilver Park with distances from 5K to 50K, aid stations, drop bag service for longer races, and mandatory course markings and cutoffs.

A community running event in Felton, California, featuring a 10K through Henry Cowell Redwoods State Park and a 1 mile kids race, beginning and ending at Roaring Camp Railroads; registration includes a pancake breakfast and supports local e..

Trail races of 10K, half marathon and 30K in Henry Cowell Redwoods State Park featuring redwood single-track, a sandy ridge, river crossings, and cupless aid stations.

A map based 5K and 10K navigation event in Fillmore and Japantown, San Francisco, with team options, checkpoint questions, and post event refreshments.

A trail 5K and 10K at Granite Beach for runners with or without dogs, featuring shaded single-track trails, mid-course aid stations, finisher medals and dog bandanas.

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.

A two-day Spartan obstacle race at Mahon Ranch near Sacramento featuring Sprint 5 km, Super 10 km, kids races, team entries, volunteer options and spectator access.

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.

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.

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.

Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.

A trail race at Stevens Creek County Park in Cupertino offering a Half Marathon, 11K, and a charity 2.5-mile Lollipop Loop with aid stations and post-race barbecue.

Run through Bishop Ranch and San Ramon in this diverse racing event. Choose between a half marathon, 10k, 5k, or beer mile before enjoying unlimited tastings with your finisher medal.

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.

A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.