The Arnensee (French Lac d' Arnon ) is a reservoir near Gsteig (Canton Bern ). The 17 meter high Erdschüttdamm jams on the Tschärzisbach so that he, Morges can be used to generate electricity from the energy Romande. The dam is 140 meters long. The reservoir has a volume of 11.9 million cubic meters, a length of 1.5 kilometers and a surface area of 45 ha The dam was completed in 1942.
A toll road leads from driving Feutersoey to the dam, there is a restaurant in its vicinity. In the summer season there is a bus service from Gstaad to the lake.