Трог
Upper Wensleydale is high, open and remote U-shaped valley overlying Yoredale Beds. The gradient is gentle to the north end of the valley, becoming steeper further south. Glacial drumlins lie either side of the river, which is shallow but fast flowing. The river is fed from many gills cutting through woodland and predominantly sheep farmsteads. The Settle to Carlisle railway runs along the western side of the valley here.