Lake McConnell to have drained first into Lake Agassiz", an even larger lake to the southeast, "then into the Arctic Ocean via the Mackenzie River, then back into Lake Agassiz, and then back to the Arctic Ocean" at various times in its history. Either 8,300 or between 9,000 and 8,000 years ago, it divided to form Great Slave Lake and Lake Athabasca. These two and Great Bear Lake are considered its 'daughter' lakes. Lake McConnell Lake McConnell was a very large proglacial lake that existed in what is now Canada from 11,800 to 8,300 years ago. Other sources give starting and ending
Boats of the Mackenzie River watershed Boats of the Mackenzie River watershed The Mackenzie River in Canada's Northwest Territories is a historic waterway, used for centuries by the original Dene as a travel and hunting corridor. It is part of a larger watershed that includes the Slave, Athabasca, and Peace rivers extending from northern Alberta. In the 1780s, Peter Pond, a trader with the North West Company discovered this watershed and began viable trade with the Athapascan-speaking Dene of these rivers. The Mackenzie River itself, the great waterway extending to the Arctic Ocean, was first put on European maps by Alexander Mackenzie in 1789, the Scottish