From Passo Gardena, trail nr. 666 climbs the grassy ridge that leads to the Grup dl Sela craggy walls in a south-east direction. The trail continues, over even ground to begin, then slightly downhill, reaching the entrance to Val Setus. Twisting and turning, climb the steep scree slope until you come to the gully's fork, then go left ( fixes metal ropes) quickly reaching the great overhang that crosses the entire Sella massif. Going left, it will only take a few minutes to come to the Pisciadú hut. (2h 10min.). Close by is the Pisciadú lake. The descent is firstly eastwards past the great terrace ( nr. 676), then down again through the Val di Bosli craggy overhanging sides ( fixed metal ropes), arriving below in the Val Mezdì. Now follow a gravel track, before continuing on a trail on good conditions and you are out of the Val Mezdì. The view out over the valley bottom's green meadows in enchanting, with their constrast against the light colour of the rocky sides. Next to the river, descent to the larch-covered plain, then through meadows on trail nr. 650, and you are at Colfosco.