The Dora Riparia is an alpine river, a left-hand tributary of the Po. It is 125 km (78 mi) long, with a 1,231 km² drainage basin. It originates in the Cottian Alps, close to the Col de Montgenèvre in France, where it is called the Piccola Dora. Its name becomes the Dora Riparia after the confluence with the Ripa in the Argentera Valley and the Thuras de Bousson close to Cesana.
View of the river on a bridge at Lungo Dora Napoli.