12 hours on a flat 500m loop—choose your conditions with morning or night start
Other trail races within 90 miles
A 12-hour fixed-time race on the USATF-certified 500-meter gravel loop at Nardini Manor. Runners choose between a 7:00 AM morning start or a 7:00 PM night start, each presenting a different challenge on this exposed Arizona desert track. With crew access every lap and a fully-stocked aid station on course, runners can pursue a new personal distance record without ever straying more than 500 meters from support. Course records: Men 80.55 miles (Jacob Jackson, 2019), Women 69.28 miles (Kristina Pham, 2017).
Some ultra experience recommended
Buckeye, AZ, United StatesMay 30, 2026
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Average daytime temperatures exceed 100°F. Ice and water provided but sun protection is essential for morning/day starters.
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