| Inconnue | |
| Map: | Nottaway map.png |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Eeyou Istchee Baie-James (municipality) |
| Length: | 68.5km (42.6miles)[1] |
| Source1: | Lake La Ribourde |
| Source1 Location: | Eeyou Istchee Baie-James (municipality), Nord-du-Québec, Quebec |
| Source1 Coordinates: | 49.8786°N -75.7303°W |
| Source1 Elevation: | 341.7m (1,121.1feet) |
| Mouth: | Maicasagi River |
| Mouth Location: | Eeyou Istchee Baie-James (municipality), Nord-du-Québec, Quebec |
| Mouth Coordinates: | 49.9622°N -76.2678°W |
| Mouth Elevation: | 268m (879feet) |
| Tributaries Left: | Nomans River |
| Tributaries Right: | Colette creek |
The Inconnue River (French: Rivière Inconnue) is a tributary of the Maicasagi River located in the municipality of Eeyou Istchee Baie-James, in the administrative region of Nord-du-Québec, in the Canadian province of Quebec, in Canada.
The course of the Inconnue River crosses the townships of Ribourde, Daine, Krieghoff, Montalambert, La Rouvillière and Monseignat.
The hydrographic slope of Inconnue River is served by a secondary road along the North shore of the Waswanipi River and separating from Road 113 connecting Lebel-sur-Quévillon to Chibougamau; as well as by the secondary road R1018 (North-South direction) coming from Matagami and which crosses the Maicasagi River at of its mouth.
The surface of the Inconnue River is usually frozen from early November to mid-May, however, safe ice movement is generally from mid-November to mid-April.
The main hydrographic slopes near the Inconnue River are:
The Inconnue River originates at the mouth of Lac La Ribourde (length: altitude:). This lake is connected to Daine Lake on the east side. This source of the river is located at:
From the mouth of the head lake, the "Inconnue River" flows over according to the following segments:
Upper part of the Inconnue River (segment of)
Lower part of the Inconnue River (segment of)
The "Inconnue River" flows to the south bank of the Maicasagi River flowing west to the East shore of Maicasagi Lake. Then the current flows Southwest through the Max Passage into the Goéland Lake. The latter is crossed to the northwest by the Waswanipi River which is a tributary of Matagami Lake.
The mouth of the Rivière Inconnue located at:
The toponym "Rivière Inconnue" was officialized on December 5, 1968, at the Commission de toponymie du Québec, i.e. at the creation of this commission[3]