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 above sea level. If the lake's water level rises above that, the pumps and gates on the Jordan River are left open.