The Leadhills and Wanlockhead Light Railway was a short branch railway built in Scotland to serve mining settlements, high in the Lowther Hills, connecting them to the Carlisle - Carstairs main line. The line was opened in 1901 - 1902, and was the highest standard gauge railway line in the British Isles. Hoped-for developments did not emerge, and when the world lead price slumped in the 1920s, the line sustained heavy losses. It was closed on 2 January 1939.