It consists of 8 stages with a total distance of 203 km. Also called Road Tunnel of San Adrian or Route of Bayonne, part from Irun and joins the French Way in Santo Domingo de la Calzada. It was one of the most important routes in the tenth and thirteenth centuries, as one of the safest for Christians of the time on their way to the Holy Sepulchre, as the Camino de Santiago de la Costa paths, is I was haunted by that then by the Vikings. This way, besides being a fundamental Jacobeo axis was the gateway to the center of the peninsula from Irun and in time of Roman rule. They took advantage of ancestral shepherd trails to build a Roman road which still vestiges. In the Middle Ages, devotees from France and the Basque Country, using this road on their way to the tomb of the Apostle.