Park in the car park of the Aviation Museum in Warluis.
(S/E) Take the main road (C2) to leave the village. You will reach an X-shaped crossroads.
(1) Leave the return path on your right, continue along the road for 150 metres, then take the path on the left. Walk along a fence and cross the Moulin grove.
(2) At Petit Bruneval, take the road on the right and head towards Bruneval. Join the road you started on, take it to the left for 20 metres, then take the tarmac path on the right and continue towards the castle. At the crossroads, turn left.
(3) Just before the houses (fire hydrant), turn right onto the grassy path that runs alongside the woods and head towards a barn. In front of the castle, turn left onto a path and continue to a small road. Turn left towards Merlemont, then at the crossroads in the centre of the hamlet, go up the road on the right (Rue de la Chapelle).
(4) Turn right. Walk past the chapel on the left, pass by the edge of the woods, cross the road and continue along the path opposite. Stay on the main path which climbs straight ahead and leads to a crossroads.
(5) Take the path on the right for a few metres, then follow the one on the left. At the bend, stay on the main road and head for the former Abbey of Saint-Arnoult. Continue along the path, then along the road, pass the crossroads and continue straight ahead along Rue de Saint-Arnoult.
(6) Go up the path on the left, along the edge, then into the woods. Continue straight ahead, cross the wooded hill and descend to the edge of the woods, then continue straight ahead.
(7) Cross the road and take the path opposite. Walk along a copse and come out onto the road you took on the way there.
(1) Follow it to the left to return to the starting point (S/E).