The Bonneville Salt Flats lie in which U.S. desert?

The Bonneville Salt Flats lie in Utah's Great Salt Lake Desert.

The Great Salt Lake Desert is a large, mostly dry lake basin in northern Utah, between the Great Salt Lake and the Nevada border. It is part of the larger Great Basin Desert and contains extensive salt deposits left behind by Lake Bonneville, a huge Ice Age lake that covered much of the region.

The Bonneville Salt Flats are the most famous salt pan in this desert. Their remarkably flat, bright surface formed as mineral-rich water evaporated, leaving a dense crust of salt. The flats are about 12 miles long and 5 miles wide, though the surrounding Great Salt Lake Desert is far larger.

The location is famous for land-speed racing because the hard, level surface can support extremely fast vehicles. The first land-speed record there was set in 1914. The Bonneville Salt Flats are sometimes confused with the Great Salt Lake itself, but the flats are a separate dry remnant of the ancient lake system.