abstract:Fosen is a traditional district in Trøndelag, consisting of the municipalities Osen, Roan, Åfjord, Bjugn, Ørland, Rissa, Agdenes, Snillfjord, Hemne, Hitra and Frøya. The district is dominated by forested valleys, lakes, coastal cliffs but also shallow areas, and in the interior mountains reaching up to 700 m elevation.