The trail starts at the car park opposite number 1 route départementale 943. Coming from Saint-Omer, it is after the town hall and the war memorial, before the sign indicating the end of the built-up area. Coming from Aire-sur-la-Lys, it is at the entrance to Wittes on the left opposite the garden machinery shop and just after the town sign.
(S/E) From the start sign, turn left and then immediately right. 500 m further on, at the crossroads, turn left and continue straight ahead to reach the Aire-sur-la-Lys cemetery at the departmental road.
(1) Turn right onto this road and cross it before the roundabout. Then turn right and immediately left and drive alongside the cemetery. At the intersection, turn left to join Chemin de la Ballastière.
(2) After the water treatment plant, turn right and continue straight ahead to Rue du Fort Gassion.
(3) Cross it and turn left after the bridge. At the intersection, cross the Lys and keep left twice to return to Rue du Fort Gassion.
(4) Cross it and then walk along the path beside the Canal de Neuffosés without changing direction to reach the departmental road (Rue de l'Argent).
(5) Turn right onto the grassy path. Then climb the stairs. Before the bridge, turn left and then immediately right.
Fork At the crossroads, turn left and continue to the lime tree and statue. There, turn right and go up the dirt track without changing direction to reach Rue de Cassel.
(7) Turn left. At the crossroads, go straight ahead. In front of the cemetery entrance, go straight ahead. At the crossroads in front of the town hall, turn left to return to the starting point (S/E).