Fat Ox

The Fat Ox Endurance Runs is a multi-distance ultrarunning event held at Estrella Mountain Regional Park in Goodyear, Arizona. Featuring a USATF-certified 0.988-mile loop course, the event offers distances including 48-hour, 24-hour (hosting the USATF 24-Hour Championship), 12-hour, 6-hour, 100-mile, 100K, 50-mile, and 50K races. The course is a paved sidewalk loop around the park's turf area with scenic views of the Estrella Mountain Range.

Runners benefit from a fully stocked aid station, live timing, and a supportive atmosphere. Camping is available nearby, and the event includes awards, prize money for championship races, and finisher swag. Visit the organization's website for the most recent information.