Atnsjøen is a lake in Innlandet county, Norway. The lake lies along the border of the municipalities of Sør-Fron and Stor-Elvdal, just east of Rondane National Park. The Norwegian County Road 27 runs along the eastern shoreline of the entire lake. The village of Sollia lies about to the southeast of the lake. See also List of lakes in Norway References Sør-Fron Stor-Elvdal Lakes of Innlandet