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 loop course primarily on single-track trails, including sections of the Pacific Crest Trail and various state parks. Participants face approximately 15,400 feet of elevation gain and descent, with a 32-hour completion limit.

Registration opens on January 1, 2025, and is limited to 300 entrants, with a waitlist available. The event emphasizes community involvement, offering scholarships and discounts for military and first responders, and requires volunteer service for entry eligibility. Visit the organization's website for the most recent information.