Reuss

The Reuss is a Swiss river. With a length of 164 kilometers (102 miles) and a drainage basin of 3,426 square kilometers (1,323 square miles), it is Switzerland's fourth largest river (after the Rhine, Aare, and Rhône). The upper Reuss is the main valley of the Uri canton. The lower Reuss flows from Lake Lucerne to the Aare River's confluence at Brugg and Windisch.

Along with the Rhine, Ticino, and Rhône, the Reuss is one of four major rivers that originate in the Gotthard region.

The Gotthardreuss rises in the Gotthard massif, emerging from the canton of Ticino's Lago di Lucendro (reservoir built in 1947; elevation 2,134 m) and passing into the canton of Uri at Brüggboden (1,910 m).

The Furkareuss rises from Schwärziseeli east of Furka Pass and forms the Urseren valley, passing Realp at 1,540 m. This source is only about 5 kilometers away from and on the same mountain massif as the Rhône's source, but it will eventually lead to the opposite side of the continent.

Length: 164.4 km (102.2 mi)