Lake Louise is a lake in Alberta, Canada. The glacial lake is located in Banff National Park, 5 km (3.1 mi) from the hamlet of Lake Louise and the Trans-Canada Highway.
Lake Louise is named after the Princess Louise Caroline Alberta (1848–1939), the fourth daughter of Queen Victoria and the wife of the Marquess of Lorne, who was the Governor General of Canada from 1878 to 1883. The Stoney Natoka Indian name for the lake is "Lake of the Little Fishes".
The emerald colour of the water comes from rock flour carried into the lake by melt-water from the glaciers that overlook the lake. The lake has a surface of 0.8 km2 (0.31 sq mi) and is drained through the 3 km long Louise Creek into the Bow River.