Lake Minnewanka ("Water of the Spirits" in Nakota - the Stoney Indian language) is a glacial lake located in the eastern area of Banff National Park in Canada, about five kilometres northeast of the Banff townsite. The lake is 24 km (15 mi) long and 142 metres (466 ft) deep, making it the longest lake in the mountain parks of the Canadian Rockies (the result of a power dam at the west end).