Traun (] ()) is a river in the Austrian state of Upper Austria. Its source is in the Totes Gebirge mountain range in Styria. It flows through the Salzkammergut area and the lakes Hallstätter See and Traunsee. The Traun is a right tributary of the Danube, which it meets near the city of Linz. Other towns along the river are Bad Aussee, Bad Ischl, Gmunden, Wels and Traun.