Angeles Crest 100 Mile Endurance Run
Angeles Crest 100 is a Southern California mountain 100-miler through the San Gabriels, known for heat, altitude swings, and old-school endurance.
Quick facts
- Historic Southern California 100-miler in the San Gabriel Mountains.
- 2026 course starts and finishes in Altadena because of Highway 2 closure constraints.
- Course profile lists about 100.8 miles of mountain running.
- Heat management and high-country night conditions shape the race.
Is there a waitlist for the 2026 Angeles Crest 100 Mile Endurance Run?
Direct entry for the 2026 Angeles Crest 100 Mile Endurance Run is unavailable, but the official waitlist is open.
About the Angeles Crest 100 Mile Endurance Run
The Angeles Crest 100 Mile Endurance Run is one of the older American 100-mile mountain ultras. The 2026 edition uses an Altadena start and finish because of Highway 2 closure constraints, keeping the race rooted in the San Gabriels.
Course
The 2026 full-course profile lists 100.8 miles through Southern California mountain terrain. Runners should expect long climbs, exposed trail, technical descents, and elevation changes between foothill heat and higher San Gabriel sections.
Race-day weather
Early October in the San Gabriels can still bring hot, dry foothills, cooler high-country nights, and wind exposure. Heat management and late-race temperature swings are part of the race's character.
Past Angeles Crest 100 Mile Endurance Run dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Saturday, October 3, 2026 | Upcoming | — |
| 2025 | Saturday, August 2, 2025 | Completed | Open results |
| 2024 | Saturday, August 3, 2024 | Completed | Open results |
Ran this race?
Share your race experience
Your firsthand experience can help future runners understand the course, logistics, and race-day atmosphere. A short report takes about two minutes.
Angeles Crest 100 Mile Endurance Run FAQ
When is the Angeles Crest 100 Mile Endurance Run?
The 2026 Angeles Crest 100 Mile Endurance Run is on Saturday, October 3, 2026.
Is there a waitlist for the 2026 Angeles Crest 100 Mile Endurance Run?
Direct entry for the 2026 Angeles Crest 100 Mile Endurance Run is unavailable, but the official waitlist is open. View the official registration details at ac100.com.
Featured collections
Found an official update?Send race details or links
Send us confirmed dates, registration links, results, live tracking, or course changes. Include the source link so runners can reach the right information.