Take the cycle path north towards Fiames - Cimabanche.
After the second tunnel, turn sharp left and you will come to the SS51 main road.
Continue steeply up to the Ra Stua hut then turn left after 100m. A technical descent with a fairly even surface takes you to a bridge over the Boite torrent.
Glide down through the meadows of Pian de Loa and, at the bottom, bear left to Fiames.
Return to Cortina along Pian de Ra Spines.