Flat, white, and relentless — an out-and-back across the Bonneville Speed Salt
Other trail races within 185 miles
The most accessible SFER distance — a flat out-and-back across the Bonneville Salt Flats. Runners head north along the Bonneville Speedway for 10 miles on hard-packed salt, continue across compacted salt sands to the 'No Post' aid station at 15.5 miles, then reverse course to the finish. One of the flattest ultras in existence. No crew, no pacers, and no drop bags — just you and miles of white. The 10-hour window is generous for fit runners, but May desert heat on the exposed, shadeless salt demands respect.
Suitable for first-timers
Wendover, UT, United StatesApril 30, 2027
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Dogs may not run the 50K course as crew is not permitted on this event. Dogs may be present at the start/finish venue.
Car camping on the Bonneville Salt Flats at the Start/Finish area in dry years. Event toilets provided. Portable fire pits only — no open fires on the salt. All ash and refuse must be taken off the salt.
Temperatures regularly reach 80–90°F with zero shade for the entire 31-mile course
Reflective white salt significantly amplifies UV radiation throughout the course
No required gear specified
No recommended gear specified
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