Baku, September 9, AZERTAC Peyto Lake is a glacier-fed lake in Banff National Park which is located in southern Alberta along the shared border with British Columbia in the Canadian Rocky Mountains.Similar to many other glacier-fed lakes in Banff National Park, Peyto Lake is a brilliant blue during the summer months. During the summer, significant amounts of glacial rock flour flow into the lake, and these suspended rock particles give the lake a bright, turquoise color. Because of its bright color, photos of the lake often appear in illustrated books, and area around the lake is a popular sightseeing spot for tourists in the park.This is a natural phenomenon found in many glacier lakes as the glaciers grind rock down into the rock flour, carried downstream into the lake. This rock flour then refracts the light and gives off a vivid blue or teal color.