Coordinates: 54°40′30″N 2°13′44″W / 54.675°N 2.229°W Langdon Beck is a village in County Durham, England. It is situated in upper Teesdale, between Forest-in-Teesdale and Harwood, halfway between Penrith and Durham. It is a stronghold for the black grouse, one of the few sites for them in the North of England.