The Heber is surrounded by a number of hill ranges: the Harplage to the north, the foothills of the Harz Mountains to the southeast, the Helleberg to the southwest, the Sackwald to the west, the Vorberge to the northwest and, several kilometres away, the Hildesheim Forest to the northwest. A number of streams rise within and on the edge of the Heber whose waters sooner or later make their way into the northwards-flowing Innerste or the westward-flowing Leine; the ridges thus lies on the watershed between the two rivers.