Mistassibi River should not be confused with Mistassini River.
| Mistassibi River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Saguenay–Lac-Saint-Jean |
| Length: | 298km (185miles) |
| Source1: | Unnamed wilderness |
| Source1 Coordinates: | 51.1253°N -72.0517°W |
| Source1 Elevation: | 575m (1,886feet) |
| Mouth: | Mistassini River |
| Mouth Location: | Dolbeau-Mistassini |
| Mouth Coordinates: | 48.8844°N -72.2181°W |
| Mouth Elevation: | 115m (377feet) |
| Basin Size: | 9325km2 |
| Tributaries Left: | North-East Mistassibi River |
The Mistassibi River is a river in central Quebec, Canada. It is long and has a drainage basin of . Its source is an area with unnamed lakes about east of Canso Bay of Lake Albanel, eastern neighbor of Lake Mistassini.[1]
The name Mistassibi, only in use since the late 19th century, comes from the Innu-aimun language, meaning "large river". Its alternate name used to be Rivière aux Foins (Hay River).[1]
Just like the nearby Mistassini River, the Mistassibi River runs in a north–south direction. It passes through Lac au Foin (Hay Lake) and among its tributaries are the aux Oiseaux, du Dépôt, and North-East Mistassibi Rivers. It drains into the Mistassini River at Dolbeau-Mistassini.[1]
The company Minashtuk Inc. operates a 12 MW run-of-the-river hydroelectric power station on the Mistassibi River since 2000.