Tooele County, Utah Dugway Proving Ground in Tooele County. The county's western portion is home to the Bonneville Salt Flats, traversed by Interstate 80 and the Wendover Cut-off, the former routing of the Victory Highway. According to the U.S. Census Bureau, the county has a total area of , of which is land and (4.7%) is water. Covering vast amounts of the Great Salt Lake desert west of Salt Lake Valley, Tooele County is the second largest county in Utah and among the driest. As of the census of 2000, there were 40,735 people, 12,677 households, and 10,128 families residing in the county.
Pioneer 1 (land speed racer) making it eligible for "FIA" Class 1 ( and under). It was claimed to have set a Class 1 record of for the measured kilometer at the Baskunchak dry salt lake, and was the first Soviet land speed racer to exceed . In 1962, the power of the engines was increased to , while weight rose to . The improved car raised the Class 1 and Soviet national records for the measured kilometer to . In 1963, Tikhomirov modified "Pioneer 1" even further, to create "Pioneer 2M". Pioneer 1 (land speed racer) Pioneer 1 is a Soviet "FIA" Group VII