Pechengsky District
Pasvik Nature Reserve (; ) is a bilateral nature reserve located in the valley of Pasvikdalen in Norway and Russia. The nature reserve was established in 1992 (Russia) and 1993 (Norway), and covers an area of . The Norwegian part, in the municipality of Sør-Varanger, covers , while the Russian part, in Pechengsky District, Murmansk Oblast, covers . The nature reserve includes unexploited parts of Pasvikelva and has a rich birdlife.