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 a total distance of 100 kilometers. The first loop, the longest at 31.5 miles, leads runners to the summit of Cuyamaca Peak. The second loop covers 12.6 miles near Oakzanita Peak, while the final 18.3-mile loop offers stunning desert views along the Pacific Crest Trail. The event emphasizes community involvement, welcoming volunteers to assist during the race. 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 Old West Trail Runs, taking place in Anza Borrego Desert State Park, features a 50K, marathon, and half marathon, offering runners a chance to experience the scenic beauty of the desert. Scheduled for March 15, 2025, the event starts and finishes at Stagecoach Trails RV Resort, which provides am..

The Pirate's Cove 6/12/24 Hour Run/Hike is an exciting endurance event taking place at Lake Cuyamaca, CA, on March 21, 2025. Participants can choose to run or hike for 6, 12, or 24 hours, making it suitable for various skill levels. The event includes a mandatory access fee to the park, which is cov..

The Oriflamme 50K is a scenic trail running event taking place in the 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..

The Ramona Wine Country 5K is an exciting running event set in the scenic Backcountry Gardens of 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 partic..

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

UTMB Index

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 predominantly single-track course that includes sections of the Pacific Crest Trail and traverses multiple state parks. Participants..