River Tay River Tay The River Tay () is the longest river in Scotland and the seventh-longest in the United Kingdom. The Tay originates in western Scotland on the slopes of Ben Lui (), then flows easterly across the Highlands, through Loch Dochart, Loch Iubhair and Loch Tay, then continues east through Strathtay (see Strath), in the centre of Scotland, then southeasterly through Perth, where it becomes tidal, to its mouth at the Firth of Tay, south of Dundee. It is the largest river in the UK by measured discharge. Its catchment is approximately , the Tweed's is and the Spey's is
River Tay William McGonagall's poems "The Tay Bridge Disaster" and "Railway Bridge of the Silvery Tay" and the German poet Theodor Fontane has mentioned the Tay in his poem "Die Brück' am Tay". Both poems deal will the Tay bridge disaster of 1879 seeing the bridge's construction as a case of human hubris and expressing an uneasiness towards the fast technological development of mankind. It is mentioned in the Steeleye Span song "The Royal Forester". Many Rolls-Royce civil aero-engines are named after British rivers, one of which is the Rolls-Royce Tay. River Tay The River Tay () is the longest river in