Solway Firth
![Map of Solway Firth.](/Images/godic/202502/12/Solway_Firth_map0733.png")
![The estuary of the River Nith, opening into Solway Firth south of Dumfries.](/Images/godic/202502/12/River_Nith_estuary0733.jpg")
The Solway Firth (Scottish Gaelic:Tràchd Romhra) is a firth that forms part of the border between England and Scotland, between Cumbria (including the Solway Plain) and Dumfries and Galloway. It stretches from St Bees Head, just south of Whitehaven in Cumbria, to the Mull of Galloway, on the western end of Dumfries and Galloway. The Isle of Man is also very near to the firth. The firth comprises part of the Irish Sea.