Koivusuo Strict Nature Reserve (Koivusuon luonnonpuisto) is a strict nature reserve located in the North Karelia region of Finland.
| Koivusuo Strict Nature Reserve | |
|---|---|
  Location in Finland | |
| Location | North Karelia, Finland |
| Coordinates | 62°58′32″N 31°24′12″E / 62.97556°N 31.40333°E |
| Area | 20 km2 (7.7 sq mi) |
| Established | 1982 |
| Governing body | Metsähallitus |
This reserve has been a regular place for visits by wolverines, bears, lynxes and wolves for most of the history.
Some of the Koitajoki trails (Tapion taival) go by the area.