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Bonneville Backyard Ultra

Charleston, United States • 25 Apr 2026

The Bonneville Backyard Ultra, held near Provo, Utah at the Deer Creek Dam Trailhead, is a challenging last-person-standing ultramarathon. Runners complete a 4.167-mile out-and-back loop along the scenic Deer Creek Reservoir every hour on the hour. The course is mostly smooth and runnable, but the repetitive hourly loops, mental strain, and sleep deprivation make it tough.

Participants must start each loop on time or are eliminated, with only one runner finishing. The event emphasizes endurance and mental toughness over a set distance or time limit. It offers a unique, intense atmosphere for ultrarunners seeking to push their limits. Visit the organization's website for the most recent information.

United States Utah Charleston

Race information

Registration
4 mi
4.167-Mile Loop Every Hour
Visit the organization's website for the most recent information.
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