Saane (in German) or Sarine (in French) is a major river of Switzerland. It is 128 km (80 mi) long and has a drainage area of 1,892 km2 (731 sq mi).It is a tributary of the river Aare.The Saane rises in the Bernese Alps, near Sanetschhorn, in the Canton of Valais. It forms the Lac de Sanetch reservoir at 2034 m, and then enters the Canton of Bern, traversing the Sanetsch falls between 1900 and 1400 m.