Bowderdale is a hamlet in Cumbria, England, 6 miles (10 km) southwest of Kirkby Stephen. It is also the name of a dale in the Howgill Fells, the valley of Bowderdale Beck which rises on the western slopes of Yarlside and flows 5 miles (8 km) north to join the River Lune below the village of Bowderdale. For most of its length the beck forms the boundary between the parishes of Ravenstonedale and Orton.