Flat, white, and relentless — an out-and-back across the Bonneville Speed Salt

No Service Requirement

Does not require trail or volunteer work

No qualifier race required

Suitable for first-timers

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.

The course follows the Bonneville Salt Flats Speedway — the same salt surface where the world's fastest cars race each year

An almost perfectly flat out-and-back across the white salt plain — no hills, no technical terrain, just pure miles

Zero shade for 31 miles and a surface that bounces UV and heat back at you — a genuine test of heat management

This event uses open registration - no lottery entry required.

This event does not require a qualifier for entry.

This race does not have a service requirement for entry.

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.

No Service Requirement

Does not require trail or volunteer work

No qualifier race required

Suitable for first-timers

The course follows the Bonneville Salt Flats Speedway — the same salt surface where the world's fastest cars race each year

An almost perfectly flat out-and-back across the white salt plain — no hills, no technical terrain, just pure miles

Zero shade for 31 miles and a surface that bounces UV and heat back at you — a genuine test of heat management

This event uses open registration - no lottery entry required.

This event does not require a qualifier for entry.

This race does not have a service requirement for entry.

Dogs may not run the 50K course as crew is not permitted on this event. Dogs may be present at the start/finish venue.

Salt Flats Endurance Runs 50K

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Tushars Mountain Runs 100K

Salt Flats Endurance Runs 50K

What Makes It Great

Difficulty

Race Highlights

Finish Awards