The park was formed in 1971 to protect the lake and the forests stretching eastwards to Sweden.

There are also wild reindeer grazing in the heights and, in summer, a herd of around 30 musk oxen roam the area along the Røa and Mugga Rivers (in winter they migrate to the Funäsdalen area).

This group split off from an older herd in the Dovrefjell area and migrated here.

[1] The National Park influenced the name of the album Femundsmarka of the German black metal band Waldgeflüster.

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