Wikipedia
Østerdalen
Østerdalen is a valley and traditional district in Hedmark County, in Eastern Norway. It consists of the municipalities Rendalen, Alvdal, Folldal, Tynset, Tolga and Os in the north, Elverum, Stor-Elvdal, Engerdal, Trysil and Åmot in the south. It historically included Särna and Idre, today in Sweden.