San Diego 100

Noble Canyon 50K/15K is an ultramarathon set in the mountains east of San Diego, California, near Pine Valley. The event offers two distances—50K and 15K—run on National Forest land. The course is described as mostly runnable single-track, delivering rugged terrain, spectacular mountain views, and a..

The Cuyamaca 100K is an ultramarathon held in Cuyamaca Rancho State Park near Julian, California, about an hour east of San Diego. The race features a challenging 100-kilometer course composed of three distinct loops starting and ending at Camp Cuyamaca. The first loop covers 31.5 miles on the park'..

The Mount Laguna Trail Marathon, held in Mount Laguna, California, is a well-organized Southern California trail race featuring a challenging single-loop course of technical single-track trails. The marathon covers rolling terrain with a total elevation gain of 3,358 feet. The first half of the cour..

Anza Borrego Cuyamaca 50 Mile Run is a point-to-point ultramarathon covering 50 miles from the Sunrise Trailhead near Julian, California, to Stagecoach Trails RV Resort & Campground. The course climbs to Stonewall Peak, winds through wooded trails near a lake, then descends into Oriflamme Canyon and..

Dixon Lake 10/10 Trail Race takes place in Escondido’s Daley Ranch, starting at El Caballo Park and sending runners onto rugged Daley Ranch trails up to Stanley Peak for a 360-degree panoramic view. The event offers two main distances: 10-mile and 10K (with a 5K option noted in some listings), with..

Del Dios Trail Race, billed as The Race of the Gods, unfolds at Lake Hodges in Escondido, California. The event offers four distances: 5K (3.1 miles), 10K (6.1 miles), Half Marathon (13 miles), and a 50K (31 miles). Courses traverse dirt service roads and single-track trails, with elevation gains ra..