The legendary 100-mile run started back in 1986. One of the original five 100 milers. AC100 has strived to keep the race’s original point-to-point course from Wrightwood to Altadena largely intact while preserving its level of difficulty. It’s one of only 6 point-to-point 100-mile runs in the country. You’ll traverse 100 miles of San Gabriel mountains from elevations of 1,135 to 9,300 feet.
The 36th Annual AC100 is scheduled for October 3, 2026.
The Lottery will open on September 19, 2025 and close on September 29, 2025. If you’re interested in running, you may register your interest and receive an early invitation to the 2026 lottery.
