The Firth of Tay (/ˈteɪ/; Scottish Gaelic: Linne Tatha) is a firth on the east coast of Scotland, into which the River Tay (Scotland's largest river in terms of flow) empties. The firth is surrounded by four council areas: Fife, Perth and Kinross, City of Dundee, and Angus. Its maximum width (at Invergowrie) is 3 mi (4.8 km). Two bridges span the firth: the Tay Road Bridge and the Tay Rail Bridge. The marshy Mugdrum Island is the only major island in the firth.