Ådalsfjella is a mountain range in southern Norway. It consist of a series of smaller peaks and mountains located within Ringerike in Buskerud county. Ådalsfjella is a small mountain range which stretches from within Vestre Ådal in Ådal to Vassfaret bordering Sør-Aurdal in Oppland. The mountain range lies between Lake Sperillen to the east and the valley of Soknedalen to the west.