From the Totalphütte, the route leads you down a path to Lake Lünersee. Following the lakeshore path to the left, the way takes you to the Douglass Hut. Lake Lünersee lies at about 1,970 meters above sea level and is located at the end of the Brandnertal. It is one of the largest high mountain lakes in Vorarlberg and also the biggest reservoir for power generation. At the time of its commissioning in 1958, the Lünersee power plant was the most powerful pumped-storage power plant in the world. Lake Lünersee measures about 112 hectares and has a maximum filling volume of 78.3 million cubic meters.