Louise, Lake, 11/2 mi (2.4 km) long, alt. 5,680 ft (1,731 m), SW Alta., Canada, in the Rocky Mts., in Banff National Park. Noted for its scenic beauty, it is surrounded by high peaks, glaciers, and snow fields, which are reflected in its waters. The lake was explored in 1882 and later was named for Princess Louise. It has become a popular year-round tourist and mountain-climbing center. The lake drains to the E into the Bow River.