 The Caldew's source is high up on Skiddaw, between the summit and Sale How, in the Lake District, from where it runs east through a valley between Bowscale Fell and Carrock Fell.At Hutton Roof, the river emerges from the dale and turns sharply northwards, a course taking it through the settlements of Hesket Newmarket, Sebergham, Buckabank and Dalston.At Buckabank the river flows over a weir that provides a mill stream to the cotton mill and there is a salmon ladder.