Firth locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point. However, some firths are exceptions. The Cromarty Firth on the east coast of Scotland, for example, resembles a large loch with only a relatively small outlet to the sea and the Solway Firth and the Moray Firth are more like extremely large bays. The Pentland Firth is a strait rather than a bay or an inlet. These are connected to, or form part of, the
Rough Island, Scotland Rough Island, Scotland The isle of Rough is a 20-acre (8 ha) tidal island located in the Rough Firth off the Solway Firth, Scotland, in the historical county of Kirkcudbrightshire the same region where the River Urr flows into the Solway. The isle of Rough is 79 feet (24 metres) at its highest point. Since 1937 the isle of Rough has been in the ownership of the National Trust for Scotland. The island is now a bird sanctuary. Accessible across the causeway from Kippford when the tides allow or across the mudflats from Rockcliffe, the isle of Rough can be