Bonneville Backyard Ultra
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Event Format
The Bonneville Backyard Ultramarathon follows the last person standing race format. Runners must complete one 4.167-mile loop every hour on the hour. They must be back in the starting corral before the bell rings for the next hour to continue. The race continues until only one runner remains; all others record a DNF (Did Not Finish).
The Course
The course is an out-and-back route along Deer Creek Reservoir, with about 2.08 miles each way. The terrain is described as mostly smooth and runnable.
Race Details
The race begins on April 25, 2026. Runners must be at the start line by 8:55 AM. Each hour's start is signaled by whistles at three, two, and one minute before the hour, with a bell ringing exactly on the hour to start the loop.
Other Information
No pacers are allowed. Detailed information on gear, rules, parking, and crew is available on the event's official website. Visit the organization's website for the most recent information.
