| Black River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Black River in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northeastern Ontario |
| Subdivision Type4: | Districts |
| Source1: | Unnamed lake |
| Source1 Location: | Kirkland Lake, Timiskaming District |
| Source1 Coordinates: | 48.2211°N -79.9714°W |
| Source1 Elevation: | 357m (1,171feet) |
| Mouth: | Abitibi River |
| Mouth Location: | Iroquois Falls, Timiskaming District |
| Mouth Coordinates: | 48.6994°N -80.635°W |
| Mouth Elevation: | 239m (784feet) |
| River System: | James Bay drainage basin |
The Black River is a river in Cochrane District and Timiskaming District in Northeastern Ontario, Canada.[1] It is part of the James Bay drainage basin, and is a right tributary of the Abitibi River. The municipality of Black River-Matheson is named after the river.
The river begins at an unnamed lake in geographic Morrisette Township[2] in the municipality of Kirkland Lake, Timiskaming District, just north of Kirkland Lake Airport, and heads north into geographic Bisley Township[3] in Cochrane District, then turns northwest, and enters geographic Melba Township[4] in the municipality of Black River-Matheson. It takes in the left tributaries Little Black River and Whiteclay River, passes under Ontario Highway 572, takes in the right tributary Pike River, flows through the Black River Generating Station and dam, built in 1929,[5] and passes under Ontario Highway 101 at the community of Matheson. From this point on, the original river course is flooded to the same elevation as the Iroquois Falls Generating Station[6] on the Abitibi River at Iroquois Falls downstream. The Black River continues northwest, takes in the left tributary Watabeag River, enters geographic Walker Township[7] in the municipality of Iroquois Falls, takes in the right tributary Shallow River and left tributary Driftwood River, and reaches its mouth at the Abitibi River. The Abitibi River flows via the Moose River to James Bay.
In Matheson-Black River, from the community of Wavell to the community of Matheson, both Ontario Highway 11 and the Ontario Northland Railway main line follow the river valley.
Other map sources: