From Arabba we head East, following the descent on asphalt on provincial road SP n° 48 until the village of Renaz, where, in front of the artisan dairy (which is worth a visit and some tastings) there's a junction to the left that takes us uphill on asphalt to Malga Cherz. From here the route gets steeper until the Rifugio Incisa, which we pass by a few dozen metres and, before giving in to the temptation of the descent which would take us towards Corvara, we turn left and take on the slight climb along a well marked path. From here we continue prevalently through forests, without too much difficulty or changes in incline, until we come to Passo Campolongo. We follow the asphalt of the provincial road for a couple hundred metres and then, when we reach a conglomerate of hotels we exit to the left, taking a narrow single track which quickly becomes steep and heads straight down to Arabba. An easier alternative is to descend from Passo Campolongo to Arabba along the provincial road.