San Diego 100

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 traverses various recreational areas, including sections of the Pacific Crest Trail. Participants must complete the race within a 32-hour time limit, facing approximately 15,400 feet of elevation gain.

To qualify, runners must have completed a 50-mile race in under 13 hours or similar events within specified timeframes. The event also emphasizes community involvement, requiring volunteer hours or donations for entry. Special awards are given to solo runners who complete the race without crew support. Visit the organization's website for the most recent information.