With an area of 663 square kilometres (256 sq mi),[3] Ringvassøy is the sixth largest island in mainland Norway. The island's highest point, Soltindan, has a height of 1,051 metres (3,448 ft) above sea level. The 10-kilometre (6.2 mi) long Skogsfjordvatnet is the largest lake on an island in Norway.[2]