It's not recommended to use this trail in the uphill direction.
Start at the highest point of Altissimo di Nago, the cross at elev. 2.079 m. Follow a track to the northeast, past the houses (Rifugio Damiano Chiesa) and enter there the marked path #622.
At the back of the mountain, this trail leads through the meadows to the saddle of Bocca Poltrane (elev. 1.831m). Some rocks on the singletrack here will test you.
At this point, turn to the right (south). You'll see Malga Campo 200m below. It is a fast and intermediate trail. Near the end, there is a section with a little bit of small loose stone: shale. And at the end, at Malgo Campo (elev. 1.630m), there will be some cows and a lot of cow manure...