Bonneville Backyard Ultra
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Bonneville Backyard Ultra
The Bonneville Backyard Ultra is a last person standing endurance event held in Provo, Utah. Following a traditional backyard ultra format, participants must complete a 4.167-mile loop every hour. The race continues until only one runner remains to start and finish a loop within the time limit. All other participants are classified with a DNF (Did Not Finish) once they fail to meet the hourly start or complete a lap.
The course is located at the Deer Creek Dam Trailhead and consists of an out-and-back route along the Deer Creek Reservoir. Each lap covers 2.08 miles in each direction. The terrain is described as mostly smooth and runnable, though the event format emphasizes repetitive laps and mental endurance over a fixed distance.
The event follows a strict starting protocol. Runners must be inside the starting corral before the bell rings at the top of every hour. Audible signals are provided at three minutes, two minutes, and one minute before each start. No late starts or pacers are permitted during the competition.
Distances available: Visit the organization's website for the most recent information.
- 4.167-mile loops repeated hourly until one runner remains.
