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
Perth Bridge bridge being widened in 1869 by A.D. Stewart. Its stone parapets were removed, and footpaths projected over iron brackets. Perth Bridge Perth Bridge (also known as Smeaton's Bridge, locally, the Old Bridge and in the local dialect of Scots, "the Auld Brig") is a toll-free bridge in the city of Perth, Scotland. It spans the River Tay, connecting Perth, on the western side of the river, to Bridgend, on its eastern side, carrying both automotive and pedestrian traffic of West Bridge Street (the A85). It is a Category A listed structure. The bridge was completed in October 1771, which places