Fat Ox Endurance Runs
Buckeye, United States • 20-22 Nov 2026
Fat Ox Endurance Runs - Estrella Mountain Regional Park
Fat Ox Endurance Runs is a multi-distance endurance event held at Estrella Mountain Regional Park in Goodyear, AZ. Races take place on a USATF certified 0.988178 mile concrete loop around the park turf area with about 6 feet of elevation gain per lap and a maximum elevation near 923 feet.
Distances and formats include:
- 48 Hour
- 24 Hour
- 12 Hour
- 6 Hour
- 100 Mile
- 100K
- 50K
The course runs around the Turf Picnic area and includes a fully stocked aid station on course and a water refill station on the opposite side. Timing mats are used each loop and participants will change running direction every six hours. Pacers are not permitted. Crew and personal drop bag areas are provided near the course; crew tents for the USATF championship must remain within 100 meters of the main aid station.
Camping is available approximately 400 feet from the course and Maricopa County charges a vehicle entry fee for park access. An on-site EMT will be present for the duration of the event. The 24 hour portion serves as the USATF 24 hour championship; eligible championship competitors must hold current USATF membership and are subject to drug testing and championship rules. Awards include a total prize purse for top men and women. Visit the organization's website for the most recent information.