The forest of Pracharbon is the gateway to Ayas; it stands on a prehistoric landslide that naturally marked the boundary and still characterizes the morphology of the area with its rocky boulders, more or less large, covered with moss and lichen or by snow giving the forest a fairy-tale feeling. From Corbet, the trail climbs up to a chapel associated with ancient legends, to descend toward the small village abandoned of the Servaz. It starts climbing again along a comfortable road that leads to Alpe Crespin, from which there are spectacular views of Brusson, the castle of Graines and the Dames de Challand. The trail continues by re-entering the forest, until it reaches Corbet again.
