Fat Ox Endurance Runs
Buckeye, United States • 21-23 Nov 2025
Event overview
The Fat Ox Endurance Runs take place November 21-23, 2025 at Estrella Mountain Regional Park in Goodyear, Arizona. The event features fixed-time and fixed-distance options, including:
- 48 Hour
- 24 Hour (hosting the USATF 24-Hour Championship on November 22, 2025)
- 12 Hour
- 6 Hour
- 100 Mile
- 100K
- 50K
The event uses a USATF certified loop course and offers chip timing, finisher awards, gender-cut long sleeve shirts, live split tracking, an onsite massage therapist, and a well stocked aid station.
Course and logistics
The course is a certified 0.988178 mile concrete loop around the turf picnic area. Elevation gain is about 6 feet per loop; maximum elevation listed is 923 feet. The course will be marked with cones and flagging. There are no course lights, so participants should bring personal lighting for night running. Pacers are not permitted. Crew access and personal drop bags are allowed; for the USATF championship, crew tents must remain within 100 meters of the main aid station.
Onsite services include a 24-hour aid station with prepared meals and staple items, an EMT provided by a medical service, restrooms on course, and parking (park entry fee applies). Camping is available for an additional fee about 400 feet from the course, with tent and cot rental options. Prize money is allocated for top three men and women in the USATF 24-hour race. Visit the organization's website for the most recent information.