Lake Athabasca is in the north-west corner of Saskatchewan and the north-east corner of Alberta between 58° and 60° N in Canada. The lake is 26% in Alberta and 74% in Saskatchewan.

Saskatchewan is a province in Western Canada, bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and to the south by the United States. Saskatchewan and Alberta are the only landlocked provinces of Canada. In 2023, Saskatchewan's population was estimated at 1,225,493. Nearly 10% of Saskatchewan's total area of 651,900 km2 (251,700 sq mi) is fresh water, mostly rivers, reservoirs, and lakes.