Great St. Bernard Pass (Fr. Col du Grand-Saint-Bernard, It. Colle del Gran San Bernardo) (el. 2469 m.) is the third highest road pass in Switzerland. It connects Martigny in the Canton of Valais in Switzerland to Aosta in Italy. It is the lowest pass lying on the ridge between the two highest summits of the Alps, Mont Blanc and Monte Rosa. The pass itself is located in Switzerland in the canton of Valais, very close to Italy. It is located on the main watershed that separates the basin of the Rhône from that of the Po.