Auf´m Knoll lies in the Upland, the northeastern foothills of the Rothaar mountains, in the wider Diemelsee Nature Park area between Titmaringhausen North Rhine-Westphalia and Usseln Hesse. The source of the river Diemel is very close to the top of the hill, around 0.7 km in northeast direction. There are also sources for the river Aarbach (0.4 km northwest) and river Wamecke (1.1 km southwest) in the closer area.