 The 1645 Treaty of Brömsebro was ambiguous regarding the status of the parishes, but when the exact path of the border was to be decided in 1751 Norway accepted a border west of Idre and Särna.In 1971 the three municipalities "Särna", "Idre" (which itself had been split off from Särna in 1916) and "Älvdalen" were amalgamated to form the present municipality of Älvdalen.Särna has a continentally-influenced subarctic climate with mild summers and cold winters.