Trail Running calendar near Brea 2025-2026

The Keepin' It Rural will take place in San Marcos on Sunday 7 December 2025. You can run between 5 and 10 kilometers.

The Dixon Lake Trail Race, held annually at Daley Ranch in Escondido, California, offers runners scenic trail runs with distances of 10 miles, 10K, and 5K. Starting at El Caballo Park, the 10-mile course ascends to Stanley Peak, providing participants with stunning 360-degree views. Elevation gains..

The Crystal Cove Trail Run, held at Crystal Cove State Park in Laguna Beach, California, offers a scenic and challenging trail running experience just minutes from the beach. The event features three distances: a 15k, a 6k, and a Kids 1k race. Both the 15k and 6k courses include fire road climbs, ri..

The Paramount Ranch Trail Runs, held in Agoura Hills, California, offer a variety of race distances including 50K, marathon, 30K, half marathon, and 10K. Set on scenic trails at Paramount Ranch, the event provides runners with a chance to experience beautiful terrain and a welcoming atmosphere. The..

The Del Dios Trail Race, known as the "Race of the Gods," is an annual trail running event held at scenic Lake Hodges in Escondido, California. The 11th edition takes place in early January 2026 and offers multiple race distances including a 50K, half marathon, 10K, and 5K. The courses feature dirt..

The San Diego 50 Mile & Trail Marathons is a diverse running event taking place in Escondido, California, featuring multiple race options including a 50-mile ultra marathon, trail marathon, marathon relay, heavy half marathon, and various shorter distances for all ages. The event emphasizes inclusiv..

The Sean O'Brien 100K is a trail running event held in Calabasas, California, offering multiple race distances including 100K, 50 miles, 50K, marathon, and 30K. The 100K race serves as a qualifier for the Western States 100. The course features scenic trail views with notable vantage points around m..

The Ranch 50K is a trail running event held at Daley Ranch in Escondido, California, featuring a challenging course with significant elevation gain. The 50K race consists of two loops of a 15.6-mile trail, totaling 31.1 miles with 6,318 feet (1,926 meters) of climbing. A half marathon option covers..

The San Pasqual Valley Trail Race, held in Escondido, California, offers a scenic running experience through San Diego's wine country. Now in its 9th year, the event features three distances: a relatively flat 10K, a Half Marathon, and a challenging 20-mile course. The longer distances include two s..

The Catalina Island Marathon, held annually in Avalon, California, is the oldest trail marathon in the state and serves as California’s State Off-Road Marathon Championship. The event features multiple race distances including a full marathon (26.2 miles), 10K, 5K, and a kids' run. The course runs t..

The Nine Trails 35 Mile Endurance Run is a trail running event held in Santa Barbara, California. It offers two distance options: a challenging 35-mile course and a shorter 17-mile route. The race takes place on scenic trails that showcase the natural beauty of the Santa Barbara area, providing runn..

The Valencia Trail Race, held in Valencia, California, offers a challenging and scenic trail running experience with three distance options: 10K, half marathon, and 50K ultra. Set against the backdrop of Southern California’s hills and mountains near the California State Park boundaries, the course..

The Coast to Crest 10K and 5K is an annual trail running event held in Del Mar, California, featuring a very flat and fast course ideal for runners seeking personal records. The out-and-back routes are 100% dirt trail, well-groomed, and offer spectacular wide-open lagoon views with a downhill finish..

The Billy Goat Mountain Climb is a challenging trail running event held in Silverado, California, within the scenic Cleveland National Forest. It offers three race distances: a 17-mile run, a half marathon, and a 10K, catering to various levels of trail runners. The course features rugged mountain t..

The Nature Made Great Race is an annual running event held in Agoura Hills, California, near Los Angeles. Celebrating over 40 years, it features multiple race distances including the Chesebro Half Marathon, Old Agoura 10K, Deena Kastor 5K, and a 1-mile fun run. The half marathon course offers scenic..

The Leona Divide is a challenging trail running event held in Lake Hughes, California, at The Lakes Community Center. It offers multiple race distances including 30K, 50K, 50-mile, 100K, and 100-mile options, with the 100K and 100-mile races serving as Western States 100 qualifiers. The course featu..

The Boney Mountain Trail Run is a scenic trail running event held in the Santa Monica Mountains, starting at Rancho Sierra Vista | Satwiwa National Park in Newbury Park, California. It features a challenging half-marathon course that includes creek crossings, single-track climbs, and stunning ocean..

The Gorgonio View Trail Run takes place at Big Bear Mountain Resort's Snow Summit in Big Bear Lake, California. This scenic 10K trail race offers runners the chance to explore picturesque singletrack trails winding through high-altitude pine forests. The course features a mix of smooth paths and cha..

The Nanny Goat race, hosted at a private horse ranch in Riverside, California, offers a unique ultrarunning experience featuring distances of 6, 12, 24 hours, a 100-mile solo race, and a 24-hour relay for teams up to four runners. The course is a flat, one-mile loop on mostly dirt and grass with goo..

The Saddleback Marathon, held in Silverado, California, is a premier trail running event set in the scenic Saddleback Mountains within the Cleveland National Forest. Offering marathon, half marathon, and 10K distances, the race features challenging courses with significant elevation gains—4,244 feet..