Leave Boí (1.290m) from its northernmost point, following the street on your right, right in front of the parking lot entrance. It leads directly to the Roquetes trail. Walk along it, in the midst of superb dry-stone retaining walls and wood terraces until you reach the road to Caldes. Turn left and go back some 200 m along the road in order to take the trail that leads to Caldes. Once you have crossed the Boí bridge, pass behind the hostel and continue towards Caldes de Boí spa (1.450m).