The Fat Ox Endurance Runs returns to Buckeye, Arizona on November 20th through the 22nd of 2026, featuring a range of endurance events including a USATF 24-Hour Championship and various loop runs at Estrella Mountain Regional Park. This year's event marks the debut of a new venue with a certified track that winds around the turf area in the park, providing runners an opportunity to challenge themselves over distances from six hours up to forty-eight hours. On race morning, participants can expect clear views of the Estrella foothills as they prepare for their endurance test. The temperature is expected to hover between 60 and 75 degrees Fahrenheit with low humidity levels typical of a November day in Buckeye. This allows runners to focus on pacing rather than battling extreme weather conditions. The Fat Ox has been an annual event since its inception, drawing hundreds of participants each year who come together for the shared experience of pushing their limits over long distances. In 2026, it will host not just one but multiple events including a USATF championship race on November 21st, adding prestige and competitive spirit to the weekend's activities. The course at Estrella Mountain Regional Park offers runners a firm yet slightly soft trail surface with each loop measuring exactly 0.988 miles in length around the park’s turf area. The terrain is flat without significant elevation changes, making it an ideal setting for endurance athletes looking for consistent pacing over multiple hours or days. Weather conditions are expected to be mild during race week, with temperatures ranging from a comfortable morning low of about 60 degrees Fahrenheit climbing up into the mid-70s by late afternoon. Low humidity levels and minimal wind will provide optimal running weather throughout the event period in Buckeye, Arizona. The Fat Ox Endurance Runs offers participants several endurance options including a USATF 24-Hour Championship race as well as shorter distances like six hours or twelve hours up to forty-eight hours of continuous running around Estrella Mountain Regional Park.
For registration and more information on the event, interested runners can visit https://ultrasignup.com/register.aspx?did=138020 where they will find all necessary details including fees: $155 for 12 Hours, $225 for both 24 Hours options (including the USATF championship), and up to $305 for 48 Hours. All entries are non-refundable but transferable under specific conditions detailed on the website. Race day registration will be handled at Ramadas 8 & 9 located near the start/finish line within Estrella Mountain Regional Park starting from November 19th until race morning. Competitors must bring their confirmation emails and photo ID to collect their bib numbers before proceeding onto course paths. Participants are also advised that camping on site is available for an additional fee with setup areas right along the loop track. Starting at 8am sharp, runners will gather outside Ramadas 8 & 9 situated east of Estrella Mountain Regional Park’s turf field area where all race activities commence including a USATF championship event. The park address is 14805 W Vineyard Avenue in Buckeye, Arizona. All participants must adhere to the age requirements set forth by each individual distance category. The Fat Ox Endurance Runs in Buckeye, Arizona from November 20th through 22nd, 2026 offers endurance athletes an unparalleled opportunity to compete against themselves and others over a variety of challenging distances at Estrella Mountain Regional Park. The event's new venue promises scenic views and optimal conditions for long-distance running under the guidance of USATF rules for championship races.
Races Offered
12hrs
Nov 20, 2026
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Distance —
12 Hours
terrain
Type —
Running
timer
08:00
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$155.00
24hrs
Nov 20, 2026
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Distance —
24 Hours
terrain
Type —
Running
timer
08:00
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$225.00
48hrs
Nov 20, 2026
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Distance —
48 Hours
terrain
Type —
Running
timer
08:00
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$305.00
6hrs
Nov 20, 2026
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Distance —
6 Hours
terrain
Type —
Running
timer
08:00
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$115.00
100 Mile
Nov 20, 2026
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Distance —
160.9K
terrain
Type —
Running
timer
09:00
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$245.00
USATF 24HR
Nov 21, 2026
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Distance —
24 Hours
terrain
Type —
Running
timer
08:00
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$225.00
100k
Nov 21, 2026
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Distance —
100K
terrain
Type —
Running
timer
08:30
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$175.00
50K
Nov 21, 2026
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Distance —
50K
terrain
Type —
Running
timer
09:30
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$130.00
Weather History
These values represent the 3-year monthly averages for November in Buckeye.
