Start: Castillon Village
Arrival: Castillon via Saint Antonin. Take the staircase to the left, arriving at the parking lot of the Arcades du Serre, a path starts on the left in an undergrowth, crosses a valley, then goes up under the chestnut trees.
Arriving on the little road of the place called «Le Remegon», follow it on the right, at the end of the track take a path passing between two properties.
It descends to the ruins of the chapel of Saint Antonin, the return is made on a small paved road passing in front of the hotel restaurant «La Bergerie», at the bottom of the village.