USARunningRoad100K · 100 km / 62.1 mi100mi · 160.9 km / 100.0 mi12H24H48H50K · 50 km / 31.1 mi6H

Fat Ox Endurance Runs

Goodyear, Arizona, Estrella Mountain Regional Park, 14805 West Vineyard Avenue, Turf Picnic Area · USA

Next race day

Fri, 20 Nov 2026

5 distances · see start times below

About Fat Ox Endurance Runs

Fat Ox Endurance Runs is a running event in Goodyear, Arizona, Estrella Mountain Regional Park, 14805 West Vineyard Avenue, Turf Picnic Area, United States. Recorded disciplines include 100K, 100mi, 12H, 24H, 48H, 50K, 6H. The listed surface is road. The listed organiser is Aravaipa Running. The next listed date is 20 November 2026. Check the organiser's information for entry and race-day arrangements.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

100mi · 160.9 km / 100.0 mi
Fri, 20 Nov 2026
Starts 09:00 MST
Entries open
Official entry
Fixed-distance race on the concrete park loop. Follow the organiser’s distance-specific start position and lap instructions.
Edition source
6H
Fri, 20 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies. Choose the 08:00, 14:00 or 20:00 start when registering.
Edition source
12H
Fri, 20 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies. Choose the 08:00 or 20:00 start when registering.
Edition source
24H
Fri, 20 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies.
Edition source
48H
Fri, 20 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies.
Edition source
50K · 50 km / 31.1 mi
Sat, 21 Nov 2026
Starts 09:30 MST
Entries open
Official entry
Fixed-distance race on the concrete park loop. Follow the organiser’s distance-specific start position and lap instructions.
Edition source
100K · 100 km / 62.1 mi
Sat, 21 Nov 2026
Starts 08:30 MST
Entries open
Official entry
Fixed-distance race on the concrete park loop. Follow the organiser’s distance-specific start position and lap instructions.
Edition source
6H
Sat, 21 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies. Choose the 08:00, 14:00 or 20:00 start when registering.
Edition source
12H
Sat, 21 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies. Choose the 08:00 or 20:00 start when registering.
Edition source
24H
Sat, 21 Nov 2026
Starts 08:00 MST
Entries open
Official entry
Timed race on the organiser’s certified 0.988178-mile loop; total distance varies. Open and USATF championship entries share this date and start. Championship eligibility requires current USATF membership and US citizenship; select the appropriate entry category.
Edition source