Siljan, Lake

Also spelled  Silja,   lake in the administrative län (county) of Dalarna, central Sweden. Covering an area of 112 square miles (290 square km; including Orsa and In lakes, 137 square miles [354 square km]), it is Dalarna's largest lake and Sweden's third. After receiving the Österdal River at Mora, the lake stretches for a length of 25 miles (40 km) toward the southeast and extends into two bays, the wide Rätt to the northeast