Glasgow's River is the River Clyde, which is a river in Scotland that flows from the Southern Uplands into the Firth of Clyde. It is the eighth-longest river in the United Kingdom and is the second-longest in Scotland. The River Clyde has been an important part of Glasgow's history since the city was founded in the 6th century. It has been used for transportation, industry, and recreation, and is now a popular tourist destination.