From Aosta, the regional capital located in a flat hollow, you take the SS 27 road going northwards and after about 3 km you reach the junction for Valpelline. This is where they hold a festival on the last Sunday in July to celebrate “Seuppa à la Vapelenentse”, a local speciality made of hard bread, broth and Fontina cheese. The road continues beyond Valpelline along the narrow cut of the main valley passing through thick woods and characteristic villages to reach the small village of Oyace. The last village you meet on the route is Bionaz. The road ends at the dam of Place Moulin, one of the largest reservoirs in Europe.

Places you go through on the route:
- Aosta (590 m)
- Valpelline/Bionaz junction 3.8 km (780 m)
- Allein/Doues junction 7.1 km (775 m)
- Roisan junction 8.3 km (795 m)
- Valpelline 11.3 km (940 m)
- Bionaz/Ollomont junction 12.5 km (1,030 m)
- Oyace 19.1 km (1,360 m)
- Bionaz/dam junction 24.1 km (1,605 m)
- Dam of Place Moulin 31.6 km (1,985 m)