 The name Lenggries is derived from "Lenngengrieze" (long Gries), a long rubble field with deposits of debris from the bed of the Isar.Lenggries sits on the Isar River before it transitions into the Alpine foothills.To the east are the Tegernsee Mountains, to the west lies the home mountain of Lenggries known as the Brauneck with an elevation of over 1,555 meters above sea level.