Enns River

The Enns is a tributary of the Danube that joins the Danube northward in Enns, Austria. The Enns is a flat-J-shaped river that stretches for 253 kilometers (157 miles). It flows from its source in the village of Flachau eastward via Radstadt, Schladming, and Liezen, then turns north around Hieflau, passing through Weyer and Ternberg on its way to the Danube at Enns.

The Radstädter Tauern mountains in the Austrian state of Salzburg are the source of the Enns. It flows on an eastern trajectory through Styria, passing the Dachstein range on its southern side, along the border between the Northern Limestone Alps and the Central Eastern Alps, in a valley that emerged during the ice period. Between Admont and Hieflau, it turns north and travels through the Gesäuse, a 15-kilometer (9.3-mile) ravine that cuts through the limestone of the Ennstaler Alpen. From there, it flows north till it reaches the state of Upper Austria at the Laussabach's mouth. It constitutes the border between Upper and Lower Austria north of Steyr (formerly also known as Austria above the Enns and Austria below the Enns). At Mauthausen and the city of Enns, it finally reaches the Danube. It is the longest river in Austria alone.

On the Enns, there are now 15 hydroelectric power stations.

Length: 253.4 km