Fat Ox Endurance Runs

Buckeye, United States • 20-22 Nov 2026

Fat Ox Endurance Runs

Fat Ox Endurance Runs is a multi day endurance event held in November at Estrella Mountain Regional Park in Goodyear, Arizona. The event uses a USATF certified 0.988178 mile concrete loop around the park turf picnic area. The loop gains about 6 feet per circuit and reaches a maximum elevation near 923 feet.

Distances and formats include:

  • 48 hour fixed time
  • 24 hour fixed time
  • 12 hour fixed time
  • 6 hour fixed time
  • 100 mile
  • 100 kilometer
  • 50 kilometer

A fully stocked aid station is located directly on course and operates around the clock with meals and staple items such as peanut butter and jelly sandwiches, bean roll ups, cookies, coffee, soda and sports drinks. A separate water refill station is provided on the opposite side of the loop. The course is marked with cones and flagging; the venue does not provide course lighting so participants running at night should bring a headlamp or flashlight.

Pacers are not permitted; crew are allowed and a crew area and drop bag zone are provided. Camping is available nearby for an additional county fee and parking at the park requires a daily entry fee. The event hosts the USATF 24 hour Championship on the certified loop; USATF membership is required for championship competition and athletes may be subject to formal drug testing. Race features include chip timing, live tracking, gender cut long sleeve shirts, onsite massage, and finisher awards including custom buckles for certain distances. Prize money is offered for the USATF 24 hour Championship. Visit the organization's website for the most recent information.

Race information

48 hr
48 Hour
24 hr
24 Hour
100 mi
100 Mile
12 hr
12 Hour
100 km
100k
6 hr
6 Hour
50 km
50k
Visit the organization's website for the most recent information.
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