The 2025 Arizona Monster 300 is Sold Out. Registration for the waitlist is now open
Registration for the 2026 Arizona Monster opens April 5th, 2025. This is a standard registration with no lottery.
APRIL 4th to 11th, 2025
INTRODUCTION:
The Arizona Monster is a 309 mile point to point journey through Southern Arizona's Sonoran desert. The Sonoran desert is unique, in that it has subtropical warmth in winter and two seasons of rainfall. This creates an extreme contrast between aridity and moisture supporting diverse and vibrant flora and fauna. The route is rugged, challenging, and features some of Southern Arizona's most iconic backcountry terrain and high elevation mountains.
