California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 401 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
September 2026
Trail 5K and 10K through Bokisch Vineyards in Lodi, CA supporting California Farmland Trust, with a paella brunch, wine for participants over 21, awards by age and gender, and volunteer opportunities.
Trail races at China Camp State Park offering 5K, 10K and a stout half marathon with participant swag included and limited parking.
Experience a scenic multisport event at Crystal Cove State Beach featuring swim legs in the Pacific Ocean and a closed bike course on the Pacific Coast Highway. Choose from triathlon duathlon aquabike or trail run options.
A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.
An annual stadium stair climb and memorial walk at UC Davis Health Stadium honoring 9/11 first responders, with proceeds supporting the UC Davis Police Emergency Scholarship.
Beach gathering at Goleta Beach Park featuring a 5k or any distance, a mobile barrel sauna, ocean dips, and light refreshments.
Test your endurance at Smith Ranch in a 4.18 mile loop race where participants run every hour until only one runner remains standing.
Mile Madness is a looped trail endurance event in Auburn, California, held September 18-21, 2026. Timed events run from 3 to 72 hours with a 0.75 mile loop and options including a 100 mile race plus on-site aid and amenities.
Trail runs at Granite Beach, Folsom Lake SRA on September 19, 2026 featuring new 10 mile and 5K courses along shoreline and single track trails.
Experience trail running on a private cattle ranch in Bradley with loop courses ranging from 12km to 48 hours featuring live music and on site camping.
A community run at George's River Ranch along the San Joaquin River on September 19 2026. Events include a 10K trail, 5K, 2 mile and a kids quarter mile with registrations opening June 1 2026.
A sunset 10k in Topanga Canyon through Red Rock Canyon featuring steep climbs, singletrack, a descent to the finish, and a post-run gathering under the oaks.
Trail-based half marathon plus 5K and 10K with hills and scenic views in San Ramon on September 19, 2026; virtual entries available.
A riverside event in Fresno with 10K, 5K, 2 mile and kids quarter mile options supporting Valley Children's Pediatric Trauma Injury Prevention Program.
A timed 5K Adventure Challenge with obstacles and a Kid Family Fun Run at Westside Pavilion, Tuolumne, with headbands for all and a 5K finisher medal.
The Rebels XC Challenge is a cross-country event in Carmichael, California, featuring dedicated races for Women, Masters Men, and Open Men.
A community run and walk in Monrovia on September 19, 2026, limited to 350 participants with pre registration and day of registration options.
A cross country 5K at Rancho Bernardo Community Park with a grass start, dirt trail loop, age group awards, on site prizes and proceeds benefiting El Camino High School water polo.
Family friendly Jog in the Fog 5K in San Francisco with a scenic 3.4 mile course, post race activities, age group awards, and a race t shirt for registrants.
Trail 5K at San Pedro Park with a hilly, technical first mile; a kids run and a members only picnic follow.