The River Tay (Gaelic: Tatha) 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 and flows easterly across the Highlands and Loch Tay. It continues through Strathtay in the centre of Scotland and then southeasterly to Perth, where it becomes tidal.

The Tay is internationally renowned for its Atlantic salmon fishing and, as one of the best salmon rivers in Western Europe, it attracts anglers from all over the world. The largest rod caught salmon in Britain was caught on the Tay by Miss Georgina Ballantine at Glendelvine in 1922. It still retains the British record, weighing in at 64 lbs. Nowadays such fish are very rare, but many more fish return as grilse than was the case in those days. Within the last decade rod catches have twice exceeded 14,000 and the record catch of over 15,000 was made in 1989. No other British river has ever been able to boast such productivity.

The river is over 100 yards wide in the lower reaches. It lends itself to a variety of fishing methods depending on which stretch you are fishing and the water conditions at the time. Boats are also used to cover the water.

The Tay can hold some very large fish from spring until autumn.