Utah Lake is a freshwater lake in the U.S. state of Utah. 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 legally at 4,489 feet (1,368 m) above sea level.