Wikipedia
Øyeren
Øyeren is a lake in the Glomma River watershed, southeast of Lillestrøm. It is located within the municipalities of Enebakk, Skedsmo, Fet and Rælingen in Akershus county and Spydeberg and Trøgstad municipalities in Østfold county.
Lake Øyeren is the ninth largest lake by area in Norway with a surface area of 84.7 km². It is 101 meters above sea level and 71 meters deep.