Lake Øyeren is the ninth largest lake in Norway and has more fish species than any other. More than 25 species are registered here and most of these attain trophy size.
Lake Øyeren is a very varied lake. The Glomma, Leira and Nitelva rivers empty in the northern section creating the largest inland delta in northern Europe. Protected as the Nordre Øyeren Nature Preserve, the area is very shallow with some deeper channels. It is a very exciting area for sports fishermen. The southern part is much deeper reaching depths down to 75.5 m.