Trail Running calendar near San Marcos 2026-2027

A themed run in Long Beach on September 27 with Half Marathon, 10K, 5K, a family mile and kids dash, ocean views, chip timing and a pizza themed finish line festival.

Cuyamaca 100k is a 100 kilometer trail race in San Diego on Oct 3, 2026, crossing oak woodlands, meadows, pine forest and chaparral. The 2026 event is a Western States 2027 qualifier and supports outdoor education and public lands causes.

A two-day mountain trail festival in Big Bear Lake with five race distances, varied alpine and desert terrain, UTMB World Series Major status, and opportunities for qualification to major trail events.

Trail races of 50 miles, 50K and 30K in Cleveland National Forest near Silverado, CA, featuring remote forest roads, significant elevation gain and staffed aid stations. Mandatory self support rules include minimum water and required lights..

Trail races of 10 mile, 10K and 5K run through Gonzales Canyon Open Space in Carmel Valley on October 10, 2026. The courses include the steep section known as Puke Hill and entries are limited to 300 runners.

A multi-distance event on the Cahuilla Indian Reservation in Anza, California with looped dirt roads, camping, hot food at aid stations, and proceeds supporting the tribe's youth programs.

Experience a diverse weekend of trail running and off road duathlon at San Diego’s Scenic Lake Hodges. Choose from distances ranging from a kid’s mile to a 50K ultra marathon or tackle the mountain bike and run challenge.

Mountain trail event on October 17, 2026 offering 50K, marathon, and half marathon options that climb to Cuyamaca Peak on single track trails, with substantial elevation change and GPX course files available.

A 200 mile endurance run around San Diego County held in Escondido Oct 23 to 26, 2026. Runners have 82 hours to finish, must have crew support, and the field is limited to 24 experienced ultrarunners.

A trail event at Los Coyotes Reservation on October 23-24, 2026 offering a 3.1-mile Yellow Loop and timed 6H and 24H ultra options across desert and alpine trails, with on-site camping, food trucks, and festival amenities.

A team trail relay at Los Coyotes Reservation on October 23-24, 2026 covering 112.8 miles and 23,800 feet elevation gain with camping and village amenities.

An 8-hour loop race and a separate 6K at Wildwood Canyon State Park in Yucaipa, CA, featuring a 3.7 mile loop with ~600 ft gain per loop, aid stations, vendors, and an after party at a local brewery.

A multi-distance trail festival at Lake Perris featuring 10 to 200 mile races on looped, technical courses, substantial elevation gain, aid stations, group camping, pacer rules, and cash prizes for 100 and 200 mile overall finishers.

Trail races at Caspers Wilderness Park in San Juan Capistrano across multiple distances including 10k, half marathon, 35k, marathon and 50k. The event features marked courses, aid stations and participant merchandise.

Timed trail runs of 6 hour and 4 hour take place at Crystal Cove State Park in Laguna Beach on October 31, 2026. Organizer Sunshine Trail Racing lists entry fees and a registration deadline of October 28.

Trail running in the Pine Creek Wilderness on a wide dirt fire road with an out and back layout. The course climbs to a turnaround and returns downhill, with a 10 km option and parking at Horsethief Canyon Trailhead.

A trail race in Silverado routed out of Black Star Canyon, offering marathon, new 25k, half and 10k distances with significant elevation gain and aid stations along the course.

A six hour timed running and walking event around Lake Miramar on a paved 5 mile loop with chip timing, four aid stations, permanent quarter mile markers, participant awards and a postrace lunch.

Run through the historic streets of Avalon and the rugged interior trails of Catalina Island. Choose between a half marathon, 10K, or kids fun run featuring stunning Pacific Ocean views and island landmarks.

Live Oak Odyssey is a fixed time trail running event at O'Neill Regional Park offering 3, 6 and 8 hour looped runs on a roughly 2.75 mile loop with about 500 feet of elevation gain per loop and a main aid station.