Missinaibi River
| Missinaibi River | |
|---|---|
Thunderhouse Falls | |
| Native name | masinâpôy sîpiy — ᒪᓯᓈᐴᔾ ᓰᐱᔾ (Cree) |
| Location | |
| Country | Canada |
| Province | Ontario |
| Districts | |
| Physical characteristics | |
| Source | Missinaibi Lake |
| • location | 12 km SSW from Peterbell inside the Chapleau Crown Game Preserve, Algoma District |
| • coordinates | 48°29′56″N 83°25′52″W / 48.49889°N 83.43111°W |
| Mouth | Moose River |
• location | Unorg. Cochrane District |
• coordinates | 50°44′08″N 81°28′02″W / 50.73556°N 81.46722°W |
| Length | 426 km (265 mi) |
| Basin size | 23,500 km2 (9,100 sq mi) |
The Missinaibi River is a river in northern Ontario, Canada, which flows northeast from Missinaibi Lake, north of Chapleau, and empties into the Moose River, which drains into James Bay. This river (including Missinaibi Lake and Moose River to James Bay) is 755 kilometres (469 mi) in length. It is one of the longest free-flowing and undeveloped rivers in Ontario.
The river's name (masinâpôy sîpiy, ᒪᓯᓈᐴᔾ ᓰᐱᔾ) means "pictured waters" in the Cree language which is thought to refer to the pictographs found on rock faces along the river.
At Thunderhouse Falls, which is actually a chain of relatively small waterfalls connected by violent rapids, the river drops 40 metres, part of its descent from the Canadian Shield to the Hudson Bay Lowlands.