 The road turns East along the Bourbre valley passing through La Tour-du-Pin.The surrounding countryside rises to 580 m while the road is now about 300 m. After crossing the RN 75 the road reaches Le Pont-de-Beauvoisin on the border of Dauphiné and Savoie.The road heads Southeast taking the "gorges de Chailles" through the Chaîne de l'Épine (1125 m).