A 304-mile point-to-point ultramarathon through Southern Arizona's Sonoran Desert, the Arizona Monster 300 is one of the longest single-stage trail races in the world. The course traverses rugged backcountry and high-elevation mountains across 19 aid stations, with 84% of the route on singletrack trail. Created by Destination Trail — the team behind Tahoe 200, Bigfoot 200, and Moab 240 — the race carries a 170-hour cutoff and serves as a Western States 100 qualifier. The inaugural edition took place in 2025.