 Their drainage divide is at the Kozjak Pass at an elevation of 655 m between Cirkuše v Tuhinju and Špitalič.The largest settlements in the valley include Laze v Tuhinju, Šmartno v Tuhinju, and Motnik.The large number of old settlements points to the fact that the valley was an important thoroughfare in the Middle Ages and later as a passage between Lower Styria and Upper Carniola.