The Dora Riparia (Latin: Duria minor French: Doire Ripaire) is an alpine river, a left-hand tributary of the Po. It is 125 kilometres (78 mi) long, with a 1,231-square-kilometre (475 sq mi) drainage basin. It originates in the Cottian Alps, close to the Col de Montgenèvre in France, where it is called the Piccola Dora.