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Cleuson Dam

Natural site

Come and discover, in an incredible natural setting, the Cleuson dam and its breathtaking turquoise water !

Built between 1947 and 1950 and first commissioned in 1950 for hydroelectric purposes, the Cleuson dam was decided and built in an economic context of war. It is a dam with reinforced buttresses, the federal authorities having then required that the building be massive and resistant to bombardments.

Located at al altitude of 2’187m, it holds about 20 million m3 of water coming from the entire valley. Its imposing wall, 420m long and 87m high, stands in the middle of a breathtaking alpine landscape . This site bears witness to a perfect harmony between nature and human activity. What a sight to behold !


In addition to its impressive wall and the magnificent landscape that surrounds it, a walk along the Cleuson dam lake unveils loads of interesting information. Indeed, if you are interested in this subject, in addition to the information posts located in the surroundings, guided visits of the dam wall are also proposed, in order to discover it from the inside. Not to be missed !


Have your camera or Smartphone ready to capture the turquoise blue water. In fact, the water of the lake is tinted with this exceptional colour, known as « bleu de Cleuson » which is due to the refraction of light on the sit. A ‘must’ for photo enthusiasts !

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