Westallgäu extends to the north to, amongst others, the towns of Leutkirch, Wangen and Isny.
The Upper Argen originates in a marshy area north-west of Oberstaufen in the Allgäu and initially flows through a gorge named Eistobel, then underneath the Argentobelbrücke, then past Grünenbach towards Wangen im Allgäu.
In 1182 the abbey had possessions not only around Rot an der Rot and in the nearby valley of the Iller but also had managed to acquire possessions on the Swabian Jura, near Lindau, around Hüttisheim, Steinbach and Untermoorweiler.