The Bonneville Salt Flats is a unique land formation in northwestern Utah that beckons visitors from around the world. For racers, its surface is unequaled. The hard salt crust is perfect for both speed and safety. But there is a problem. The once 13-mile racetrack is now less than eight miles long due to salt erosion.
https://www.sema.org/sema-news/2017/02/saving-the-bonneville-salt-flats