Lake Minnewanka is a glacial lake in the eastern area of Banff National Park in Canada, about five kilometres northeast of the Banff townsite. The lake is 21 km (13 mi) long and 142 m (466 ft) deep, making it the 2nd longest lake in the mountain parks of the Canadian Rockies.

Banff National Park is Canada's oldest national park, established in 1885 as Rocky Mountains Park. Located in Alberta's Rocky Mountains, 110–180 kilometres (68–112 mi) west of Calgary, Banff encompasses 6,641 square kilometres (2,564 sq mi) of mountainous terrain, with many glaciers and ice fields, dense coniferous forest, and alpine landscapes. Provincial forests and Yoho National Park are neighbours to the west, while Kootenay National Park is located to the south and Kananaskis Country to the southeast. The main commercial centre of the park is the town of Banff, in the Bow River valley.