Patvinsuo National Park (Finnish: Patvinsuon kansallispuisto) is a national park in the North Karelia region of Finland, in the municipalities of Lieksa and Ilomantsi. It was established in 1982 and covers 105km2. There are 80km of marked walking trails in the area. The park has bogs, former managed forest and slash-and-burn areas and some old-growth forests. Suomujärvi lake is located in northeast area in the park.
