We are on the Forcella Col de Bos. From here towards Tofana di Rozes two marked routes go. The right one goes below the southern walls of Castelletto to the entry of its tunnels. The second path is visible here on the left. It goes around the western side of Castelletto and climbs over the rocks up to the ledge, where Ferrata Lipella starts. I updated that route description too. August 12th, 2016.