Utah Lake is a shallow freshwater lake in center of Utah County, Utah, United States. It lies in Utah Valley, surrounded by the Provo-Orem metropolitan area. The lake's only river outlet, the Jordan River, is a tributary of the Great Salt Lake. Evaporation accounts for 42% of the outflow of the lake, which leaves the lake slightly saline. The elevation of the lake is at 4,489 feet above sea level. If the lake's water level rises above that, the pumps and gates on the Jordan River are left open.
The first European to see Utah Lake was Father Silvestre Vélez de Escalante in 1776. He stayed with the Timpanogots band of Ute Tribe for three days. The Timpanogots were later integrated with the Mormon settlers or expelled from the area between the 1850s and 1870s. The fish of the lake were overharvested by the settlers and subsequently restocked with non-native species.
Although thirteen species of fish were native to the lake, only the Utah sucker and the critically endangered June sucker remain. The dominant species in the lake is the common carp, introduced in 1883 as an alternative to the overharvested native fish.