Sperillen
Sperillen
Rotar
[image] It is located Ådal in Ringerike municipality in the county of Buskerud.
The rivers Begna (from Begnadalen) and Urula (from Hedalen) flows into the lake from the north. At south a hydrostation is located, at Ringmoen.
The lake is well known for its fisheries, and the lake is one of the few with a commercial fishery. Common species are Whitefish, Char, Perch and Trout.