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 105 square kilometres (41 sq mi).

There are 80 kilometres (50 mi) of marked walking trails in the area.

Suomujärvi lake is located in the northeast area in the park.

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