As soon as we reach Frassenetto, the itinerary begins by following the forest track that branches off to the left, on the opposite side of the square. The road runs along the right side of the Rio Frassenetto and at an elevation of 1149 m crosses the stream and begins to climb in wide bends through the forest to the wooded ridge that descends to the southwest from M. Vas.
At a fork in the road at an elevation of 1550 m, a short distance from the spring Pozzo di Suttul, take the forest track on the right that slightly uphill leads to Casera Vas (1607 m), located in the center of a scenic clearing (possibility of shelter). The forest track climbs again to the next fork (1650 m) where, taking a left on a narrow cartroad (CAI marker 169), you can reach Casera Monte dei Buoi (1723 m) and a beautiful pasture valley dotted with huge limestone boulders.
To return, descend back to the junction and take the track to the left that descends in a southerly direction (CAI marker 169) with a series of steep switchbacks. At an altitude of 1325 the road passes near a marble quarry in loc. Naguscel (Grigio Carnico marble) and continues downhill until above the village of Sigilletto. You can descend directly to the village on the marked trail (CAI 169) or continue along the road until you reach the rolling road to Collina. Follow the paved rolling road back to Frassenetto, thus closing the loop.
