Cuyamaca 100K

Descanso, United States • 4 Oct 2025

The Cuyamaca 100K is an endurance running event set in Cuyamaca Rancho State Park, located about an hour east of San Diego, California. The course features three distinct loops, starting and ending at Camp Cuyamaca, with minimal backtracking. The first loop spans 31.5 miles and includes a climb to Cuyamaca Peak, while the second loop covers 12.6 miles near Oakzanita Peak. The final 18.3-mile loop offers breathtaking views along the Pacific Crest Trail before returning to the park. This challenging race showcases the natural beauty of the area and invites volunteers to participate in its organization. Visit the organization's website for the most recent information.

Race information

100 km
6500 m+
100k
Visit the organization's website for the most recent information.
Trail runs nearby

The Oriflamme 50K is a scenic trail running event taking place in Anza Borrego Desert State Park. This out-and-back course begins at the Sunrise Trailhead and features a diverse terrain, including single track along the Pacific Crest Trail and a significant descent into the desert. Runners will expe..

The Ramona Wine Country 5K is an exciting running event held at BackCountry Gardens in Ramona, California. Participants can choose between a two-loop 5K course or a single loop option, featuring trails, hills, and natural obstacles. The event also includes a Charity Beer Mile, where participants dri..

The Pacific Crest Trail 50 (PCT 50) is a challenging 50-mile trail run set in the scenic Cleveland National Forest, California. Scheduled for May 10, 2025, this event is part of the SoCal Ultra Grand Prix Series. The course features an out-and-back route primarily on single-track trails, with signif..

UTMB Index

The Corral Canyon Trail Scramble is an exciting running event taking place at Corral Canyon Campground in the Cleveland National Forest. Scheduled for May 17, 2025, participants can choose from four challenging courses: a 5-mile scramble, a 9-mile trail, a 14-mile option, and a 50K route. Each cours..

The San Diego 100 is a challenging 100-mile ultramarathon set in the scenic mountains of San Diego County, California. Scheduled for June 6, 2025, the race features a loop course primarily on single-track trails, including sections of the Pacific Crest Trail and various state parks. Participants fac..

The Peak is an exhilarating trail running event featuring a 50K, marathon, and half marathon, set against the stunning backdrop of Cuyamaca Peak in San Diego County. Participants will experience challenging climbs and descents, with the 50K and marathon routes featuring a significant elevation gain..