From Rifugio Amprimo follow path 513 (Sentiero dei Franchi), then at the junction with path 513A leave the Sentiero dei Franchi Trail and descend to the left to the lake of Paradiso delle Rane (Frogs’ Paradise).
Then continue on the path that heads down to the car park and head down next to the cart track towards the hamlet of Città. Once you reach the hamlet, continue for less than a kilometre on the road that leads to the hamlet of Adret . Near the church, take path 524 in the direction of the Certosa di Montebenedetto and Pian dell'Orso.
The itinerary then crosses the Gravio stream, ascends the right side of the valley up a short slope and overlooks the pastures surrounding the Certosa di Montebenedetto (a former Carthusian Monastery), which is reached after a few hundred meters on a dirt road.
After stopping to visit the ex-Monastery, retrace your steps a short distance on the unpaved access road, until you reach trail 506 on the left. After an initial steep climb, the path continues up a moderate gradient between larch trees and after about an hour you reach Rifugio GEAT Val Gravio.
This stage lends itself to some variants along connecting paths:
upstream from the Paradiso delle Rane lake, going down from the Amprimo hut on the path 513, it is possible to take the junction of the path 513A which goes eastwards through a conifer wood and heads up to the hamlet of Travers a Mont. After crossing the hamlet, the path continues, flanked for much of its length by dry stone walls. Pass the uninhabited villages of Pois and Passet. You then reach the junction with path 512 which comes up from the hamlet of Adret and follow this. After passing a rocky spur, the trail leaves the broad-leaved forest to enter a larch wood alternating with clearings and pastures and continues up a moderate slope to the refuge.
If you take path 512 you still have the chance to reach the Certosa di Montebenedetto: after entering the first clearing and having followed a short descent you will find the junction with path 512A, a connecting path that allows horses to ford the Gravio stream safely and then descend towards Montebenedetto.