In the thinly populated and predominantly wooded uplands of the Zitter Forest between 500 and sea level (NN) lie the sources of the Olef, Urft and Kyll. Its highest elevation is on the Weißer Stein (692 m; with ski slopes) southwest of Udenbreth; amongst the other hills within the Zitter Forest are the Bärbelkreuz (662.8 m), Hühnerhöhe (659.9 m), Kamberg (637.8 m).