Isar River

The Isar is a river in Tyrol, Austria, and Bavaria, Germany, that can only be navigated by rafts. The Isar begins in the Karwendelgebirge, about northeast of Innsbruck, Austria, at a height of 5,741 feet (1,750 m), and flows west until crossing into Germany at Scharnitz Pass. The river flows through a deep valley known as Porta Claudia, which was used by the ancient Romans. The gorge is presently traversed by a rail line and a road. Turning east and north again, the Isar emerges on the Bavarian plain, flowing past Munich before joining the Danube downstream of Regensburg. The river is rapid and too shallow for navigation for much of its length of 183 miles (295 kilometers). Principal tributaries of the Isar are the Loisach, Würm, and Amper.

Length: 295 km