Losna is a lake situated within Ringebu Municipality and ÃÂyer Municipality in Innlandet county, Norway. It forms part of the GudbrandsdalslÃÂ¥gen river, which, in this region, is so broad and runs so slowly that this stretch is recognized as a lake. The lake has a length of and it lies at an elevation of above sea level. The maximum depth of the lake is . The European route E6 and the Dovrebanen railway line both run along the shores of the lake.