Administrativelly, the Jungfraujoch is split between the territories of the municipalities of Lauterbrunnen and Fieschertal. The ridge between the Jungfrau and the Mönch is a major European watershed as well. The north side is drained by the Weisse Lütschine, the Aare and the Rhine. The south side is drained by the Massa and the Rhone.