| Opeongo River | |
|---|---|
 Opeongo River near the confluence with the Aylen River | |
  Location of the mouth of the Opeongo River in southern Ontario | |
| Location | |
| Country | Canada |
| Ontario | Ontario |
| Region | Northeastern Ontario |
| District | Nipissing |
| Physical characteristics | |
| Source | Opeongo Lake |
| • location | Preston Township, Unorganized South Nipissing District; in Algonquin Provincial Park |
| • coordinates | 45°41′55″N 78°16′28″W / 45.69861°N 78.27444°W |
| • elevation | 403 m (1,322 ft) |
| Mouth | Madawaska River |
• location | East of Madawaska village, South Algonquin Township |
• coordinates | 45°30′22″N 77°56′45″W / 45.50611°N 77.94583°W |
• elevation | 311 m (1,020 ft) |
| Basin features | |
| River system | Saint Lawrence River drainage basin |
The Opeongo River is a river in the Saint Lawrence River drainage basin in Nipissing District in northeastern Ontario, Canada.[1][2] The river is entirely within Algonquin Provincial Park and Opeongo River Provincial Park, except for a small portion around Victoria Lake, and is a left tributary of the Madawaska River.
- ^ "Opeongo River". Geographical Names Data Base. Natural Resources Canada. Retrieved 2011-08-08.
- ^ "Opeongo River". Atlas of Canada. Natural Resources Canada. 2010-02-04. Retrieved 2011-08-08. Shows the river course.