Kleinwalsertal is a valley in the Austrian province of Vorarlberg and part of the Bregenz district. It includes the municipality of Mittelberg and consists of three villages along the River Breitach. Due to the geographic location in the Allgäu Alps with its alpine terrain, the Kleinwalsertal has no direct traffic connection to the rest of Vorarlberg. It is accessible only via Oberstdorf, Germany, to the north, and thus is an Austrian "practical exclave" or "pene-exclave".