The walk starts from the Quai au Sable car park near the Route de Loquivy.
(S/E) In the middle of the car park, climb the path. After crossing a small stream, take the path on the left. This will take you to theGR®®34(marked in red and white). Follow the path, always taking the right-hand path. You will cross two or three other streams.
(1) At the fork, take the path on the right and continue along it, following the Léguer river.
(2) Once again, take the path on the right and continue along this path. This will take you to a slipway used for launching boats: this is the port of Le Yaudet. Leave this slipway on your right and continue along the path.
(3) Take the few steps on the left. Cross a car park. Walk along the ruins of old defensive structures at the entrance to the Léguer. Continue along the path that goes around the point. You will pass an old caretaker's house.
(4) Continue straight ahead to reach a resurgent spring, then turn left to take the stairs. Before the redeveloped area, turn right to pass behind the chapel, then right again.
(5) On the right and opposite, there is a magnificent view of the mouth of the Léguer and the Baie de la Vierge. Pass an archaeological site on your left and join the road by turning right. This is the Cote de Pont Roux, which descends very steeply.
(6) Turn left before the bridge, then after 60 metres, cross the Yaudet by first turning right then left. Follow the Pont Roux road.
(7) Take the path on the left (marked as the Vallées du Yaudet route). Continue along this path which runs alongside the river, making numerous picturesque little meanders
(8). Take the footbridge on the left that crosses the river and join the road at a place called Kervidern. Turn left onto the road and continue on it until you reach the departmental road
(9) Cross the D88A departmental road or Route de Croaz Min with caution and immediately turn left towards Crec'h Lan. At the hamlet, follow the small road on the right until you reach the Convenant Quelennec crossroads. Turn left onto a path heading east until you reach a road.
(10) Leave Kerdroniou on your left and continue straight ahead along the path between two buildings. This leads to Impasse Ar Boutill, which you follow for about 100 metres.
(11) At the crossroads, turn left (Impasse Ruboën) and continue along the path on the left until you reach the fork you passed on the way out.
(1) Turn right and return to the starting point (S/E) via the same route as on the way out: red and whiteGR®®34markings.