Utah [7] Bonneville Salt Flats Interational Speedway natural salt lake off road speed motorsports track Wendover Utah National Register of Historic Places Bull Hollow Raceway dirt off-road closed course Monticello Utah Rocky Mountain Raceways Dragway paved drag strip West Valley City Utah Rocky Mountain Raceways Speedway paved short track oval West Valley City Utah Saint George Drag Strip paved drag strip Saint George Utah Utah Motorsports Campus paved road course Tooele Utah UMC OffRoad Course dirt offroad closed course Tooele Utah