Moraine Lake is a glacially fed lake in Banff National Park, 14 kilometres outside the Village of Lake Louise, Alberta, Canada. It is situated in the Valley of the Ten Peaks, at an elevation of approximately 6183 feet (1884 m). The lake has a water surface of 0.5 kmē.
The blue-green colour is due to glacial rock flour.The lake, being glacially fed, does not reach its crest until mid to late June. However, when it is full, it is a beautiful shade of blue. The lake gets its color from the refraction of light off the rock flour deposited in the lake on a continual basis.