In the Athabasca Watershed, there are approximately 881 permanent lakes and reservoirs. Some of the largest lakes in Alberta are located within the Athabasca Watershed as well; Lake Athabasca is the largest lake in Alberta with an area of 7,770 km². Lesser Slave Lake is the 3rd largest lake in Alberta (1,160 km²), Lac La Biche is the 7th largest (234 km²), and Calling Lake is the 9th largest (138 km²).
