Fat Ox Endurance Runs

Fat Ox Endurance Runs

Fat Ox Endurance Runs takes place November 20–22, 2026 at Estrella Mountain Regional Park in Goodyear, Arizona. The event includes a multi-day fixed-time format and fixed-distance races and hosts the 2026 USATF 24 Hour Championship.

Distances offered:

• 48 Hour fixed-time event
• 24 Hour fixed-time event and USATF championship
• 12 Hour fixed-time event
• 6 Hour fixed-time event
• 100 Mile fixed-distance race
• 100K fixed-distance race
• 50K fixed-distance race

All events run on a USATF certified 0.988178 mile concrete loop with approximately 6 feet of elevation gain per loop. The course circles the Turf Picnic area and is marked with cones and flagging. A fully stocked aid station is located on course and a separate water refill station sits on the opposite side of the loop. There are no venue lights so runners planning to go through the night must bring a headlamp or flashlight.

Pacers are not permitted. Crew access and personal drop bag space are provided along the course; for the USATF championship, crew tents must remain within 100 meters of the main aid station. Amenities include chip timing, a gender cut long sleeve shirt, finisher awards with a custom buckle for the 100 Mile, and an on course EMT. A prize purse is allocated to top male and female finishers in the USATF championship. Parking and camping fees are charged by the park. Visit the organization's website for the most recent information.