Its main inlet and outlet is the north-flowing Dubawnt River which joins the Thelon River at Beverly Lake. The Thelon flows east to Hudson Bay at Chesterfield Inlet. It is on the line of contact between the Sayisi Dene band of Eastern Caribou-Eater Chipewyan people and the Harvaqtuurmiut and Ihalmiut bands of Caribou Inuit.
The main waterway is supplied by the north-flowing Dubawnt River, which joins the Thelon River at Beverly Lake. The Thelon then flows east to Hudson Bay at Chesterfield Inlet. It is situated along the border between two indigenous groups: the Sayisi Dene band of Eastern Caribou-Eater Chipewyan people and the Harvaqtuurmiut and Ihalmiut bands of Caribou Inuit.