Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt lake in the Western Hemisphere, the fourth-largest terminal lake in the world, and the 33rd largest lake on Earth. Great Salt Lake has no outlet besides evaporation so the depth depends on precipitation. It has very high salinity, far saltier than sea water. Because of its unusually high salt concentration, most people can easily float in the lake as a result of the higher density of the water, particularly in the saltier north arm of the lake.

Antelope Island is the largest of 10 islands in the Great Salt Lake.