Val San Nicolò e val Contrin
Route with about 1 hour of biking to cover the 350 meters of elevation gain on the trail to the San Nicolò Pass. Depart from Mazzin and ride the easy dirt bike path along the Avisio to the village of Pozza di Fassa. Once in Pozza take the paved road that leads into the San Nicolò valley. After a short while I recommend leaving the asphalt to try your hand at the cart track with a few hard climbs that flank the asphalt, at least you will warm up. You ride all along the beautiful valley, at the end of the valley keep left on the cartroad (which became unpaved at a certain point) and then carry the bike as mentioned in the opening.
The bottom is bumpy and unstable and the gradient is absurd. it is only 350 meters of elevation gain but it is tiring. Arriving at the pass you will enjoy a wonderful view, the Graan Vernel, the south face of the Marmolada. Possibility of refreshment at the San Nicolò pass refuge, the cakes are worth the sweat and it is wonderfully located. The descent is doable all in the saddle for those with good technical skills. Until the Contrin refuge it is a technical single track with some challenging sections, then it becomes a wide and very fast cartroad. In summer there are a lot of hikers on foot on the trail, be careful!
Traveled all the way down the Contrin Valley you will reach Alba di Canazei and there take the Avisio bike path to the starting point.