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 37th-largest lake on Earth. In an average year the lake covers an area of around 1,700 square miles , but the lake’s size fluctuates substantially due to its shallowness. For instance, in 1963 it reached its lowest recorded level at 950 square miles , but in 1987 the surface area was at the historic high of 3,300 square miles.
The lake is the largest remnant of Lake Bonneville, a pluvial lake which covered much of western Utah in prehistoric times. The Great Salt Lake is endorheic (has no outlet besides evaporation) and 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, Gunnison Bay.The lake’s shallow, warm waters cause frequent, sometimes heavy lake-effect snows during late fall, early winter, and spring.
Although it has been called “America’s Dead Sea”,the lake provides habitat for millions of native birds, brine shrimp, shorebirds, and waterfowl, including the largest staging population of Wilson’s Phalarope in the world It covered much of present-day Utah and small portions of Idaho and Nevada during the Pleistocene Epoch, more commonly known as the Great Ice Age, between 32,000 and 14,000 years ago. With the change in climate, the lake began drying up, leaving Great Salt Lake, Utah Lake,Sevier Lake, Rush Lake, and Little Salt Lake as remnants.