The Bonneville Salt Flats is a natural phenomenon that occurs in the Western United States. Each year, a thin layer of salt deposits builds up on the surface of the flats. When this happens, cars can reach speeds of over 200 miles per hour! The conditions are so perfect for racing that the Bonneville Salt Flats has been host to some of the world's most prestigious races, including the Bonneville World land Speed Record Challenge and the American Hot Rod Association's (AHRA) World Finals.