Arizona Monster 300

The Arizona Monster 300 is an extreme 309-mile point-to-point trail run through the stunning Sonoran Desert in Southern Arizona. This challenging course features a diverse terrain, including 84% single-track trails, with significant elevation changes totaling over 41,000 feet of gain and 42,000 feet of loss. Participants will navigate through iconic backcountry landscapes, supported by 19 aid stations along the route.

The event has a generous cutoff time of 170 hours, allowing runners ample opportunity to complete the journey. Registration for the event is competitive, with the 2025 edition already sold out and the 2026 registration opening soon. Visit the organization's website for the most recent information.