Loch Cluanie is an inland loch linked to the southeastern end of Glen Shiel, formed when the Cluanie Dam was built across the River Cluanie in 1955. The North of Scotland Hydro-Electric Board created the dam as part of a major hydroelectric project. The Board dammed the River Moriston and nearby Loch Loyne, feeding the loch water through a tunnel to the dam.
The dam is 675m long (2214 feet) and 40m high (131 feet).