Opinicon Lake
| Opinicon Lake | |
|---|---|
| Location | Frontenac County and United Counties of Leeds and Grenville, Ontario |
| Coordinates | 44°33′37″N 76°19′37″W / 44.56028°N 76.32694°W |
| Part of | Great Lakes Basin |
| Primary inflows | Rideau Canal |
| Basin countries | Canada |
| Max. length | 7.5 kilometres (5 mi) |
| Surface elevation | 119 metres (390 ft) |
| Settlements | Chaffey's Lock, Opinicon Lake |
Opinicon Lake is a lake in South Frontenac, Frontenac County and Rideau Lakes, United Counties of Leeds and Grenville in Eastern Ontario, Canada. This shallow lake was formed when Colonel John By built the Rideau Canal. It also is part of the Great Lakes Basin.