Starting point: Town Hall Square (Oye-Plage).
(S/E) With your back to the town hall, turn right onto Avenue Paul-Machy towards Gravelines. Cross Rue du Hasard on the right-hand side.
(1) Turn right onto Rue des Provins.
(2) At the end, turn left and follow the River Oye.
(3) Turn right, cross the Pont Loquet and follow the D255.
(4) At the junction, turn left onto the D22.
(5) After about 250m, turn right onto Rue Barbery towards Saint-Omer-Capelle.
(6) At a three-way junction, turn left and, at the next three-way junction, turn right.
(7) At the junction, continue straight ahead and cross the bridge over the A16 motorway.
(8) Turn right onto the D229 and pass the town hall and the church of Saint-Omer-Capelle. Continue straight on to Vieille-Église.
(9) Turn right and immediately ignore a turn-off to the right and one to the left.
(10) At Nouvelle-Église, turn right onto the D219.
(11) At the roundabout, turn left onto the D229 and pass by the foot of the water tower.
(12) At Courgain d'Offekerque, turn left onto Rue de la Serpentine.
(13) Cross the D230 and go straight on.
(14) Turn right onto Rue du Houlet.
(15) At Pont de la Folie, cross the D229 and follow the Canal du Houlet.
(16) At Pont de Guemps, turn right towards the mill.
(17) At Pont Belva, turn left onto the D229 towards Guemps. Pass the church and the town hall.
(18) Turn left onto Rue du Sauve-en-Temps. Cross the A16 again.
(19) Pass the Moulin Blanc d'Offekerque and continue straight on. Cross the railway line at the level crossing.
(20) Immediately afterwards, at the Pont d'Arras, turn right and follow the River Oye.
(21) At the Offekerque bridge, turn left onto the D230.
(22) Cross the D940 and continue straight ahead on the Route de la Hocquerie.
(23) Head to the right and follow Rue des Petits Moulins.
(24) At the end, turn left onto Rue de la Mer.
(25) At the hamlet of Tap-Cul, turn right onto the D119.
(26) Immediately afterwards, turn left onto Route des Dunes.
(27) At a place called Les Huttes d'Oye, turn right and continue along Route des Dunes. Pass the Leaning Tower and the entrance to the Platier d'Oye Nature Reserve.
(28) Turn right onto Rue Charles-Paul Gesser and follow it to the hamlet of l'Étoile.
(29) Then turn right and follow the D119. Pass by the last artisanal chicory roaster.
(30) Turn left onto Rue Marcel Dalle and pass the Tamaris campsite.
(31) At the end, turn right and follow the D940 (Avenue Paul Machy).
(1) Continue straight on to the starting point (S/E).