The source of the Weiß, is located within North Rhine-Westphalia, about 220 m north-west of the border with Hesse. It is located in Rothaargebirge at about 493 m above sea level, 1.6 km south of Wilgersdorf, 1.3 km east of the Kalteiche (579.3 m) and about 600 meters north of its eastern neighbor Hirschenstein (562.9 m). About 125 meters to the west of the source the state road L 904 runs from Wilnsdorf to the south. The source of the Weiß emerges from a rock.