Klöntalersee is surrounded by stunning Alpine peaks and is known for its crystal-clear water. The lake has a distinctive turquoise color and is a popular destination for hiking, swimming, fishing, and boating. There are several hiking trails around Klöntalersee that offer stunning views of the lake and the surrounding mountains. You can swim and boat in the lake during the summer months. There is a designated swimming area on the eastern shore of the lake, and you can rent boats from the nearby town of Glarus.