The Zitter Forest (German: Zitterwald) is located in the Eifel region in the German district of Euskirchen (North Rhine-Westphalia) and in the Belgian province of Liège (Wallonia).
The Zitter Forest is part of the Hohes Venn – Eifel Nature Park.
In the thinly populated and predominantly wooded uplands of the Zitter Forest between 500 and 692 m above 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).
The Hellenthal villages and settlements — like Giescheid, Miescheid, Neuhaus, Ramscheid and Udenbreth — in the northern part of the Zitter Forest belong to the highest parishes in the Rhineland.