 At the western end of Eskdale the valley divides into three smaller dales, Westerdale (the upper valley of the River Esk), Baysdale and Commondale.A series of side dales drain into Eskdale from the moors on its southern side, from west to east Danby Dale, Little Fryup Dale, Great Fryup Dale, Glaisdale and the Goathland valley.Kildale, west of Commondale and separated only by a low watershed, is drained by the River Leven, which flows west to join the River Tees.