Fat Ox
Buckeye, United States • 21-23 Nov 2025
The Fat Ox Endurance Runs, held November 21-23, 2025, take place at Estrella Mountain Regional Park in Goodyear, Arizona. This ultra-running event features multiple race options including 48-hour, 24-hour, 12-hour, 6-hour timed runs, and fixed distances of 100 miles, 100K, 50 miles, and 50K. The course is a USATF-certified 0.988-mile loop around the park’s turf area, offering a flat, concrete path with scenic Estrella Mountain views.
The event hosts the prestigious USATF 24-Hour National Championship, with prize money awarded to top finishers. Runners enjoy a well-stocked aid station, live tracking, and a supportive atmosphere suitable for first-time ultras or personal bests. Camping and crew support are available nearby. Visit the organization's website for the most recent information.