Cahuilla Rez Ultra

Cahuilla Rez Ultra takes place in Anza, California, on October 17, 2026, put on by Red Road Racing. The lineup covers almost every appetite: a 100-mile race plus 24-hour, 12-hour and 6-hour timed events all start at 7 a.m., while the half marathon (13.1 miles) and the 5K go off at 8 a.m. In the timed formats, your mileage when the clock stops is your finish.

Having short races and multi-day-scale efforts on the same site makes this an easy weekend to share, since a first-timer running the 5K and a friend attempting 100 miles are in the same place. If you have never gone beyond the marathon, the 6-hour is the gentlest doorway into ultras: walk when you want, and there is no distance cutoff hanging over you. The 100-mile deserves a full 20-week build and a rehearsed night plan.