Description of the route

From the square in Lillaz, in the municipality of Cogne, take route AV2 which continues into the Urtier valley. After reaching a group of houses and going past a short section of a penstock, it goes up into a wood, and after crossing a number of meadows, reaches the pasture of Goilles Inferiore. Next, the trail goes over the stream, across a small bridge, and continues on the orographic left bank, climbing up inside the wood. You then come to junction where the trees become less dense. Continue along the same itinerary, ignoring the path (13G) to the right that goes into Bardoney valley, until you come to the P.N.G.P. park guard’s lodge. Continue to further crossroads, where you ignore first route 13D on the right for Col Acque Rosse, then AV2 on the left for Col Finestra, and take routes 13B and 13C on the right. After a short section, take itinerary 13B, on the left at a junction, which takes first over grassy meadows and then along a hunting trail to the snowfield below the pass. The final climb is up a snowfield. Colle dell’Arietta is the most used pass between Cogne and Val Soana and is the pilgrim route to the Sanctuary of San Besso in the municipality of Campiglia.