Image

November 20-22, 2026

Sign-Up Now
2025 Photos
https://www.usatf.org/events/2024/2024-usatf-24-hour-road-championships

Fat Ox Endurance Runs

48 Hour | 24 Hour | 12 Hour | 6 Hour
100 Mile | 100K | 50K
2026 USATF 24 Hour Championships

Estrella Mountain Regional Park
Goodyear, AZ

We are excited to announce that the 2026 Fat Ox Endurance Runs will again host the USATF 24-Hour Championship on November 21, 2026!

What started as an ‘ultra-experiment’ for young Nathan Coury’s college thesis on “fat oxidation” (fat-ox) and ultra running, becomes a 48 hour family fixed-time festival celebrating our season at Nardini Manor. Note we’ve moved venues to Estrella Mountain Regional Park

Run your own experiment and push beyond your limits on the USATF Certified 0.988178 mile course.  It’s perfect for your first ultra, your first 100 mile, or your own personal best; a 48 hour time limit to discover your inner animal!

Event Location

Estrella Mountain Regional Park
14805 W Vineyard Ave
Goodyear, AZ 85338

Located in the southwest corner of the Phoenix metropolitan area, Estrella Mountain Regional Park both borders the Gila River and contains the northernmost part of the Sierra Estrella range for which it is named. Originally home to the Hohokam, followed by the Pima and Maricopa tribes, it was established as a park in 1954. It comprises 19,840 acres, and is administered by Maricopa County Parks and Recreation.

Start Times


Friday, November 20

8:00 AM – 48 Hour / 24 Hour / 12 Hour / 6 Hour Start
9:00 AM – 100 Mile Race Start (Starts 312 meters on course)
2:00 PM – 6 Hour Afternoon Start
5:24 PM – Sunset
8:00 PM – 12 Hour / 6 Hour Evening Start

Saturday, November 21

8:00 AM – *USATF 24 Hour Championship / 24 Hour / 12 Hour / 6 Hour Start
8:30 AM – 100K Race Start
9:30 AM – 50K Race Start
2:00 PM – 6 Hour Afternoon Start
8:00 PM – 12 Hour / 6 Hour Evening Start

Bib Pickup

Estrella Mountain Regional Park
Turf Picnic Area

Friday, November 20
7:00 AM – Packet pickup/race day registration begin

Saturday, November 21

7:00 AM – Packet pickup/race day registration begin

Volunteer

We need help to make Fat Ox possible. Volunteer perks include Aravaipa race credits and race swag!
Volunteer Now

Race Perks

 Gender cut long sleeve shirt Chip timed race results USATF Certified Course Well stocked aid station Finisher Award (custom race buckle for 100 Mile, 200 Mile) 

Live Tracking

Follow the 2026 Fat Ox Endurance Run with live split points throughout the race.
Aravaipa Live
Image
Register Now
Registration closes: Monday, Nov 16th
@ 11:59PM MT

Race Registration

Until 5/14 Until 9/14 Until 11/16
48 Hour $275 $305 $335
24 Hour $195 $225 $255
12 Hour $140 $155 $170
6 Hour $100 $115 $130
100 Mile $225 $245 $265
100K $155 $175 $195
50K $120 $130 $140

*Prices DO NOT include City of Goodyear taxes

All prices are before tax and Ultrasignup fees (if applicable).

Course Information

Image

Key Stats
Date | November 20-22, 2026

Loop Distance | 0.988178 Miles

Total Elevation Gain | 6 feet per loop

Max Elevation | 923 feet

Course Map

Short Course Event Details

Sights and Sounds of the 2022 Fat Ox Endurance Runs

Additional Race Info

Results & Photos

Image
Image

Proud Sponsor

Image