Storsjøen (or Storsjø) is the ninth-deepest lake in Norway at 309 m in depth. The 48.09 km2 lake lies in Rendalen and Åmot municipalities which are in Innlandet county, Norway. The lake is 35 km long, but only 1.7 km wide at its broadest point. The lake lies 252 m above sea level, has an area of 48.09 km2, and a volume of 6.69 km3. Historically, the lake was used for floating timber downstream from the forests where it was cut to the downstream mills were it would be cut and sold.