Trail Running calendar near Modesto 2026-2027

Experience an obstacle course weekend at Woodward Reservoir Regional Park near San Jose. Choose from distances ranging from a 5k Sprint to a 50k Ultra on a flat course designed for personal performance.

Experience the scenic beauty of Mount Diablo with trail races ranging from 5K to 50K. Support local land preservation while enjoying a professional event featuring a post race BBQ in Walnut Creek.

Experience one of the largest 50 mile endurance runs in the United States. Choose between 10, 25, or 50 mile distances through scenic Northern California finishing with celebratory festivities in Auburn.

Experience the scenic Merced River Canyon on hardpacked trails with two distinct options. Choose between a fast flat course along an old railroad grade or a demanding switchback hill climb with significant elevation gain.

The Sludge Trudge 5K is a paved run/walk at North Natomas Regional Park. It's a sanctioned event with professional timing and awards for top finishers. The event is hosted for a specific community group and their guests.

Trail races at Lake Chabot Regional Park in Castro Valley range from a 50 yard kids dash to a 50K ultradistance. The routes circle the reservoir and surrounding hills and distances were measured with a Rolatape surveyor's wheel.

Experience the hills of Del Valle Regional Park in Livermore with a flat 5K or hilly 10K and half marathon. All participants receive a custom medal and t-shirt with professional chip timing included for all distances.

Experience the coastal beauty of the Bay Area Ridge Trail with distances ranging from a 50 yard dash to a 50K ultramarathon. Runners enjoy expansive views of the Pacific Ocean and the Santa Cruz Mountains.

Experience a technical trail race through the scenic parks of San Carlos. Choose from four distances including a 15K long course and a dedicated kids run to support local trail maintenance.

Trail races in Huddart County Park and Purisima Creek Redwoods on April 18, 2026 offering 10K, half, 35K and 50K across technical single-track and fire roads, with chip timing, cupless aid stations, and significant elevation gain.

Trail races in the Sierra Azul Open Space Preserve near Mt. Umunhum, offering distances from 5K to 50K on out and back routes. Courses are marked with pink ribbons and supported by staffed aid stations with drop bag service for longer event..

A community trail event in Mariposa on April 19, 2026, with 5K and 12K courses starting at the historic courthouse. Aid stations and Search and Rescue support are provided, and children under 18 may participate for free.

Join the community at Feeney Park for the Mr Frogs Wild Run in Murphys California. Choose between a children's fun run plus five or ten kilometer courses featuring scenic neighborhood loops and a festive medal ceremony.

The Presidio Community YMCA hosts the 14th annual Presidio Trail Run on April 19, 2026, with 10K, 5K and 1.5 mile courses through the Presidio. Entry fees support YMCA community programs and a signed waiver is required.

Join the SJVDHA for their annual Pacing for Prevention 5K, supporting oral cancer research. Walk or run a paved, scenic trail that welcomes strollers and dogs. Connect with health professionals and participate in wellness activities.

Trail races inside Marshall Gold Discovery State Historic Park range from a Kids Run to a half marathon on varied singletrack and paved sections, with marked courses, aid stations, and notable elevation gains.

Experience a rugged trail race through the Sierra Nevada foothills featuring technical single tracks and fire roads. Choose between three distances and take on the steep ascent of El Guapo before celebrating at the finish line fiesta.

Trail races from Browns Ravine Marina follow out-and-back lakeside trails with 10K, half marathon, 35K and 50K options; aid stations appear every 4 to 6 miles and all finishers receive a custom medal.

Held May 3, 2025 at Almaden Quicksilver County Park, this trail event offers distances from a kids run to 50K on dirt roads and single track, with marked courses, multiple aid stations, drop bag service at the Hacienda and free parking.

Experience the scenery of Tilden Regional Park at the Grizzly Peak Trail Run. Choose from various distances including a 50K and marathon starting from the shores of Lake Anza in Berkeley.