Bonneville Backyard Ultra
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Bonneville Backyard Ultra
The Bonneville Backyard Ultra is a last person standing endurance race held in Provo, UT near Deer Creek Reservoir. The event follows the Backyard Ultra format: competitors complete a fixed loop each hour and continue until only one runner remains.
Each loop is 4.167 miles, run as an out-and-back course with about 2.08 miles each way along the reservoir. The course surface is mostly smooth and very runnable. Repetition, the hourly restart, and sleep deprivation are significant factors that shape the experience.
Race rules emphasize strict timekeeping and self-sufficiency. Runners must start each loop on time from a painted corral used to track who continues. Failing to begin a loop on schedule results in elimination. No late starts and no pacers are allowed. Signals mark the countdown before each start, culminating with a bell that sounds on the hour.
Organizers may invite a small number of waitlisted runners to act as standbys on race day; these invitations do not guarantee entries. The event centers on repeatedly completing the loop rather than a single finish line or total time limit. Visit the organization's website for the most recent information.
