Rogen (lake)
Rogen or Rovje is a lake on the border of Sweden and Norway. The lake is mostly located in Härjedalen Municipality in Jämtland county in Sweden with a small portion crossing the Norwegian border in the municipalities of Røros and Engerdal. The lake is the source of Sweden's longest river, Klarälven.
On the Swedish side of the border, Rogen Nature Reserve is centred around the lake. In Norway, Rogen lies inside Femundsmarka National Park in Røros and Engerdal. The lakes Nedre Roasten and Femunden lie just to the west of Rogen.
