The Susa River is a river located in the Piedmont region of northern Italy. It flows through the Susa Valley and is a tributary of the Po River. The river is approximately 90 kilometers long and is known for its scenic beauty, surrounded by the Alps. The Susa River plays an important role in the local ecosystem and supports various wildlife. It also provides recreational opportunities, such as fishing and hiking along its banks. The river has historical significance, as it has been a vital waterway for trade and transportation in the region for centuries.