The Salzburger Kopf is part of the watershed between the Dill and Sieg. The waters of the Erlenbach, which rises on its northeast flank, reach the Dill via the Haigerbach. A brook, which rises southeast of the summit, flown into the Sieg tributary, the Nister, 2 km to the east. Another brook, whose source is on the northwest flank of the Galgenberg empties into the Nister tributary, the Black Nister (Schwarze Nister).