Start from Église Saint-Vincent (car park).
(S/E) Head south-west and follow the dirt track alongside the stream (on the left). Cross the stream and emerge on the banks of the Lys.
Follow the towpath to the left. Continue along the Lys until you reach the Haverskerque water sports centre, which you should pass to the left.
(2) Turn left into a cobbled lane. Ignore Rue du Moulin on the left and cross the D916 with caution. Continue along Rue Basse. Go straight ahead, ignoring the side exits.
(3) At the crossroads, turn left into Rue du Moulin de Corbie. Cross the D122 and continue straight on Rue de la Clochette until you reach the forest.
(4) Turn right, then immediately left to enter the Bois Moyen. Stay on the forest edge for approx. 1.5km, passing over small bridges, before reaching a tarmac road.
(5) Follow the road to the right (Rue Verte). After about 250m, when the road bends to the right, continue left on a country lane at the edge of the forest. Turn right to enter the woods and immediately come to a crossroads.
(6) Turn left and take the path along the edge of the Bois d'Amont.
(7) Carefully cross the D916 and continue straight ahead, still on the edge of the national forest.
(8) Exit the forest and continue straight ahead. At the Notre-Dame de Grâce oratory, turn right into Rue de Tannay.
(9) After a few hundred metres, turn left into Rue de la Goguerie. Follow this street to Église Saint-Vincent (S/E).