High Quality Content by WIKIPEDIA articles! The Jordan River in the U.S. state of Utah is a river about 51 miles (82 km) long. Regulated by pumps at its headwaters at Utah Lake, it flows northward through the Salt Lake Valley and empties into the Great Salt Lake. Four of Utah`s five largest cities—Salt Lake City, West Valley City, West Jordan and Sandy—border the river. More than a million people live in the Jordan Subbasin, which is the part of the Jordan River watershed that lies within Salt Lake and Davis counties. During the Pleistocene, the area was part of Lake Bonneville.