Organized by Aravaipa Running, the Fat Ox Endurance Runs is a celebrated ultrarunning festival that challenges participants to test their limits on a flat, concrete loop course at Estrella Mountain Regional Park. The event will host the USATF 24-Hour National Championship on Saturday, 22 November 2025, offering a $4,000 prize purse equally divided among the top three male and female finishers. Runners can enjoy a fully stocked aid station available 24/7, live lap tracking, and the opportunity to set up personal crew stations along the course. Finishers receive custom medals, with 100-mile and 200-mile finishers earning unique belt buckles. The event fosters a supportive community atmosphere, welcoming both seasoned ultrarunners and newcomers seeking to achieve personal milestones.
Races
100 miles
100 km
50 miles
50 km
Race Date:
22 November, 2025
Scheduled for Friday, November 21, 2025, at 9:00 AM, the 100K race is held at Estrella Mountain Regional Park, Goodyear, Arizona, and is organized by Aravaipa Running. Runners will navigate approximately 63 laps of the same 0.988178-mile certified loop, offering a flat and fast course conducive to achieving personal records.
Weather based on historical averages.
FAQs
What is the Fat Ox Endurance Runs 100K?
How long is the Fat Ox Endurance Runs 100K?
Where does the Fat Ox Endurance Runs 100K take place?
What is the elevation gain of the Fat Ox Endurance Runs 100K?
How can I prepare for the Fat Ox Endurance Runs 100K?
How do I choose the right training plan for the Fat Ox Endurance Runs 100K?
Scheduled for Friday, November 21, 2025, at 9:00 AM, the 100K race is held at Estrella Mountain Regional Park, Goodyear, Arizona, and is organized by Aravaipa Running. Runners will navigate approximately 63 laps of the same 0.988178-mile certified loop, offering a flat and fast course conducive to achieving personal records.
The Fat Ox Endurance Runs 100K is 100km long.
The Fat Ox Endurance Runs 100K takes place in Goodyear, AZ, USA.
Runna classifies the Fat Ox Endurance Runs 100K elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Fat Ox Endurance Runs 100K?
Scheduled for Friday, November 21, 2025, at 9:00 AM, the 100K race is held at Estrella Mountain Regional Park, Goodyear, Arizona, and is organized by Aravaipa Running. Runners will navigate approximately 63 laps of the same 0.988178-mile certified loop, offering a flat and fast course conducive to achieving personal records.
How long is the Fat Ox Endurance Runs 100K?
The Fat Ox Endurance Runs 100K is 100km long.
Where does the Fat Ox Endurance Runs 100K take place?
The Fat Ox Endurance Runs 100K takes place in Goodyear, AZ, USA.
What is the elevation gain of the Fat Ox Endurance Runs 100K?
Runna classifies the Fat Ox Endurance Runs 100K elevation profile as Flat.
How can I prepare for the Fat Ox Endurance Runs 100K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Fat Ox Endurance Runs 100K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
Altitude
Park
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Fat Ox Endurance Runs 2025 or Aravaipa Running. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Fat Ox Endurance Runs 2025 website.
