| Dusaux Lake | |
| Location: | Baie-James |
| Type: | Natural |
| Inflow: | Nottaway River, Davoust River |
| Outflow: | Nottaway River |
| Basin Countries: | Canada |
| Pushpin Map: | Quebec |
| Islands: | 16 |
Lake Dusaux is a freshwater body of the territory of Eeyou Istchee Baie-James (municipality), in the administrative region of Nord-du-Québec, in the province of Quebec, in Canada.
The Dusaux Lake hydrographic slope is accessible via the James Bay (north-south) road from Matagami to on the East side of Lake Dusaux, and then going back north passing between Mouliers Lake and Katutupisisikanuch. The surface of the lake is generally frozen from early November to mid-May, however safe ice circulation is generally from mid-November to mid-April.
This lake has a length of, a maximum width of and an altitude of .
Lake Dusaux has 16 islands, the largest of which (Vandry Island) are located downstream. Lake Dusaux is crossed to the northwest by the Nottaway River.
Lake Dusaux begins at the foot of the Iroquois Falls in the Southeast that is fed by the Nottaway River, facing the Nestipuku Islands. This lake is also fed to the northeast by the Davoust River which empties in front of Michikushish Island. In the center of the lake, the current flows through the northwest in a zone of rapids bypassing the Desmolier Islands. Dusaux Lake terminates downstream of Vandry Island (length: which is shaped like a half-moon.
The mouth of this Lake Dusaux is located northwest, downstream of Vandry Island. Then the current of the Nottaway River will flow into Rupert Bay. The mouth of Lake Dusaux is located at:
The main hydrographic slopes near Lake Dusaux are:
The term "Dusaux", "Dussault" and "Dussaulx" are variants of the same surname of French origin.
The toponym "Lac Dusaux" was formalized on December 5, 1968, by the Commission de toponymie du Québec.[2]