Arizona Monster 300
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Event
The Arizona Monster 300 is a point-to-point ultramarathon in Patagonia, Arizona. The route covers 304 miles through the Sonoran Desert. The 2026 running is scheduled for March 27 to April 3 and uses a seven-day format with a 170-hour cutoff. The event takes place on National Forest lands.
Course and logistics
The course lists an elevation gain of 41,162 ft and includes 19 aid stations. Terrain breakdown is approximately 259.1 miles (84%) single-track, 34 miles (10%) bike path, 9.5 miles (3%) paved road, and 6 miles (2%) dirt road. Support features include a marked course, live runner tracking, drop bag transport to many aid stations, sleep stations, a medical team on site, and a bus option to the start for those parking at the finish.
Event services listed for entrants include a duffel bag and race shirt, finisher awards (handmade buckles, a custom print, and a finisher mug), a catered post-race celebration, and various food and drink options along the course. The event makes donations to local organizations, including the Arizona Trail Association, a youth enrichment center in Patagonia, and a local food bank. Registration is first-come, first-served and remains open until the event sells out. Visit the organization's website for the most recent information.
