Angeles Crest 100 Mile Endurance Run
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Angeles Crest 100 Mile Endurance Run
The Angeles Crest 100 Mile Endurance Run is a single-day ultramarathon held since 1986 that covers a 100 mile route through the San Gabriel backcountry and Angeles National Forest. The event emphasizes the backcountry setting; picnic areas and campgrounds along the corridor have been developed with minimal displacement of the natural environment. The course and race operations are supported by the U.S. Forest Service and many volunteers, and the event maintains ongoing trail work and maintenance programs.
The race provides volunteer roles including aid station support and ham radio staffing, and posts resources such as a race book, checkpoint cutoff chart, and live tracking data. Photo galleries and historical finish splits are maintained for past editions.
For 2026 the race organization announced a full course change due to major Highway 2 closures; the 36th annual running is scheduled for October 3, 2026 and will start and finish in Altadena. Entry to recent editions has involved a lottery process; the 2026 lottery opened September 19, 2025 and closed September 29, 2025 with entrants and waitlist published October 3, 2025. Certain partner races offer automatic qualification into the field through a Sterling Silver Ticket program.
Trail work days and training runs are scheduled in the months before the race to support course upkeep and to engage volunteers. Visit the organization's website for the most recent information.
