<Tr> <Th> References </Th> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> Shore length is not a well - defined measure . </Td> </Tr> <P> Lake Athabasca (/ ˌæθəˈbæskə /; French: lac Athabasca; from Woods Cree: aðapaskāw, "(where) there are plants one after another") is located in the northwest corner of Saskatchewan and the northeast corner of Alberta between 58 ° and 60 ° N. The lake is 26% in Alberta and 74% in Saskatchewan . </P> <P> The name in the Dene language originally referred only to the large delta formed by the confluence of the Athabasca River at the southwest corner of the lake . Prior to 1789, Sir Alexander Mackenzie explored the lake . In 1791, Philip Turnor, cartographer for the Hudson's Bay Company, wrote in his journal, "low swampy ground on the South side with a few willows growing upon it, from which the Lake in general takes its name Athapison in the Southern Cree tongue which signifies open country such as lakes with willows and grass growing about them". Peter Fidler originally recorded the name for the river in 1790 as the Great Arabuska . By 1801, the name had gained a closer spelling to the current name--Athapaskow Lake . By 1820, George Simpson referred to both the lake and the river as "Athabasca". </P>

Where is lake athabasca located on a map