High mountain regions represent difficult terrain for detecting rock and sediment storage areas. By means of a satellite scene by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and a digital elevation model, the geomorphological setting of the Reintal subcatchment (17 km2) east of the Zugspitze is analysed. Characteristic landforms are classified in an object-oriented approach comprising four spatial levels of differentiation. The complex, object-based decision tree hierarchy largely founds on fuzzy membership functions and to a lesser extent on a minimum distance classifier. The final landform classification scores high in the accuracy assessments. The results show that an identification of the present-day pattern of geomorphological process units is possible by remote sensing. Besides, the approach provides a first insight into the otherwise inaccessible upper regions of the study area which could not be included in any previous survey.