Following the Varaita river, the valley reach the plain towards Verzuolo and Costigliole di Saluzzo. Many mountain streams rise in the borderland and in the slopes of the Viso group. These streams originate the Varaita di Bellino and Varaita di Chianale torrents which flow into their riverbed in Casteldelfino. Many streams flow into the Varaita river; some of them are quite long, such as torrents flowing through the Gilba and Isasca valleys on the left orographical side and those through the Valmala and Lemma valleys on the right orographical side.
Varaita valley includes the municipalities of Bellino, Brossasco, Casteldelfino, Costigliole, Saluzzo, Frassino, Isasca, Melle, Piasco, Pontechianale, Rossana, Sampeyre,Valmala,Venasca and Verzuolo.