Park at the Chartreuse Monastery.
(S/E) With your back to the monastery, follow the lane then turn left onto Rue de la Chartreuse.
(1) Continue right along this street until you reach the crossroads.
(2) Turn left onto Rue de Montreuil. Go round the large roundabout on the right, using the pedestrian crossings, and continue straight on to the crossroads.
(3) Turn right onto Rue du Moulin du Bacon and follow the Canche to La Grenouillère, where you must cross the bridge.
(4) Turn right twice to follow Chemin du Robinson.
(5) Pass the confluence of the Canche and the Source.
(6) Pass the footbridge on your right and continue the route to the left until you reach the fork.
(7) Keep left onto Chemin du Marais and rejoin the Grenouillère, which you passed earlier.
(4) Continue straight on for about 200 m.
(8) Turn left onto Chemin des Remparts, then turn left towards the citadel.
(9) In front of the ramparts, turn left to go round them. Head towards the junction with Rue des Moulins.
(10) Follow it to the left to reach the lower town. At the bottom, turn right onto Rue de l'Église, then turn left onto Grand Rue Ville Basse to reach a junction with Avenue de la Gare.
(11) Turn left, cross the bridge over the Canche and follow Rue Saint-Gengoult to the junction you passed on the way there.
(3) Carry straight on to the roundabout, go round it on the left and continue along Rue de Montreuil.
(2) Turn right onto Rue de la Chartreuse and, following the route in reverse from the outward journey, head back to the (S/E).