Great Salt Lake, lake in northern Utah, U.S., the largest inland body of salt water in the Western Hemisphere and one of the most saline inland bodies of water in the world. The lake is fed by the Bear, Weber, and Jordan rivers and has no outlet. The lake has fluctuated greatly in size, depending on the rates of evaporation and the flow of the rivers that feed it. Its surface area has varied from about 2,400 square miles (6,200 square km) at its highest levels in 1873 and the mid-1980s to about 950 square miles (2,460 square km) at its lowest level in 1963. At high level the lake’s surface is 4,212 feet (1,284 meters) above sea level, and at low level it is 4,191 feet (1,277 meters). At times of median water level, the lake is generally less than 15 feet (4.5 meters) deep, with a maximum depth of 35 feet (11 meters).