Fat Ox Goodyear, AZ   Nov 20–21, 2026

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

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 the venue has moved 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!

There will be a fully stocked aid station directly on course and you can setup trackside for ultimate convenience. A fully stocked aid station is hosted 24 hours a day. Breakfast, lunch, and dinner will be prepared each day in addition to having many of the traditional staple items available at all our events. Staple items include peanut butter & jelly sandwiches, bean roll-ups, cookies, candies, coffee, soda and sports drinks.

Camping will be available for an additional fee on site.