The Arlberg connects the Klostertal valley in the west with the Stanzer valley in the east.
The European watershed in the Alps between the Rhine and the Danube runs southwards from the Albonagrat to the Passhöhe over the Valluga and Trittkopf to the Flexenpass and follows from Flexenspitz the southern end of the Lechquellen mountains to the Klostertal towards the west.