Start from the Grand'Place in Pas-en-Artois.
(S/E) Join Rue d'En-bas and follow it to the right. Take the 2nd street on the right (Ruelle Bernard) to join the D1. Follow this for a few metres, then turn right at the next junction.
(1) Turn left, then quickly find a nice path that roughly follows the D1 at a distance. Ignore the paths on the left and reach a T-junction. Turn right (barrier) and reach a crossroads. (This passage was very grassy in early May 2017).
(2) Go left, then right on a good uphill path. Ignore the track on the right and reach a small road.
(3) Follow it in the opposite direction, ignoring a path coming from the left and reaching a fork.
(4) Turn left to pass Hurtebise Farm. At the fork, turn left and follow this good path to the D1 . Follow it to the right through Thièvres.
(5) At the church, turn left into Rue de Cocagne. We are now on the GR®124 for a few km. Cross the river La Quilienne, which flows into the Authie fifty metres below. Climb up to reach a point at Bois Laleau, and continue for around 700m until you come to a small path on the right.
Turn right to reach the edge of the wood. Turn left at the edge. A little further on, at the fork, turn left along the edge. The path veers to the right and enters the undergrowth. Continue in the same direction until you reach a small road.
(7) Go straight ahead on a nice grassy downhill path (still GR®124) and join the D124. Leave the GR®° and follow the D124 a few metres to the left (water tap in the cemetery on the right: go straight down, the tap is behind the wall). At the fork (calvary), turn right and follow this good path, ignoring the side paths to reach a crossroads.
Turn left. At the T-junction, turn right onto the D25. Follow this for about 250m on the left.
(9) At the crossroads, take the right path on the left. We're now on the yellow Sentier des Bois (this will take us back to Pas-en-Artois). Follow the main path (follow the signs) through the Bois de Saint Pierre. This is a fairly bad path, even in dry weather. As soon as it gets bad, you can take a path that has opened up on the right. Keep to this path for as long as possible, as the bottom is damp. At the end of the wood, the path widens to join the D124.
(10) Follow it to the right. Just before the bridge over the Quilienne river, take the path on the right, first along the edge of the wood, then along the left bank of the Quilienne. Reach a footbridge leading to the right bank. A pretty riverside path leads to Pas-en-Artois.
(11) At the bridge, turn left into Rue de l'Abbaye. At the very end, turn left into the Grand'Place (S/E).