Firth of Tay
The Firth of Tay (Scottish Gaelic: Linne Tatha) is a firth in Scotland between the council areas of Fife, Perth and Kinross, the City of Dundee and Angus, into which Scotland's largest river in terms of flow, the River Tay empties. The firth has a maximum width of at Invergowrie.
River Dochart
Coming from Ben Lui, it flows east out of Loch Dochart and through the glen of the same name. At Killin just before it enters Loch Tay are the Falls of Dochart. The river is sometimes also considered to be a part of the upper reaches of the River Tay.