San Diego 100

The San Diego 100 course is a loop course consisting of a 90% single track mountain course which covers four recreational areas in the east county mountains of San Diego. The 2025 start and finish area are located at the south parking area of Lake Cuyamaca Recreational Area.  The course includes trails traversing sections of the Pacific Crest Trail (PCT), Noble Canyon, the Cuyamaca and the Anza Borrego State Parks, and Mt Laguna Recreational Areas. A very challenging technical course in hot and dry conditions with approximately 15,400 feet of climbing and the same amount of descent with a 32 hour time limit. The race is a once again a qualifier for Western States 100.

The race has been described as the biggest discrepancy between what it looks like on paper and how hard it actually is. Expect amazing volunteers, and incredible support. You have been warned.

Scenic & Challenging 100 Miles in Mt Laguna Recreational Area and along the Pacific Crest, Noble Canyon, and Lake Cuyamaca Trails.