The Kostomukshsky State Nature Reserve is a nature
reserve located within the Kalevalsky and Muezersky Districts of the
Republic of Karelia. Kostomukshsky State Nature Reserve was
established on December 14, 1983. The reserve was designed as part
of the regional complex, and its task was initially to neutralize
the negative effects of industrial activity of the rapidly
developing Kostomuksha mining and processing plant.
area is 49,200 ha. This is one of the 4 reserves of Russia, which is
transboundary: in 1990, the Russian-Finnish reserve "Friendship" was
created, from our side presented by Kostomuksha, and from the
Finnish - by five isolated nature conservation zones.