This is a large fresh'water delta composed of three smaller ones: the Athabasca (2000 square kilometres); the Peace (1700 square kilometres); and the Birch (170 square kilometres). Since the composition of the delta is overwhelmingly comprised of the Peace and Athabasca, the name is descriptive. The first recorded reference to the delta comes from Philip Tumor's Lake Athabasca post journal, 1790-1792, in which he stated: "....low swampy ground on the south side with a few willow growing upon it, from which the Lake in general takes its name. Athapaskan in the southern tongue signifies open country such as lakes with willows and grass growing about them or swampy land without woods."

Approximately 211 km north of Fort McMurray.