Parking is available in the car park of the Church of Wierde, Rue de Jausse.
(S/E) When leaving the car park, take the Chaussée de Jausse (very busy road) very carefully to the right for about 100 metres. Cross the road carefully before turning left onto a path just after the farm. At the next crossroads, turn left and walk across the open countryside. You will come out onto a small road not far from the motorway bridge and opposite the dog training club.
(1) Follow the road to the right (away from the noisy motorway). Walk along a stream and ignore a path on the left, heading towards the woods. When you reach a fork at the entrance to the woods, keep left. Shortly afterwards, you will reach a clearing with a hamlet of farms on the horizon, which you will cross further on. After a few steps, a path enters the woods on the left.
(2) At this point, there are two options:
- Option 1: if you wish to skip the tour of Fort d'Andoy, continue straight ahead and follow the trail to Route de Limoy. This first option shortens the hike by a good kilometre.
- Option 2: to explore Fort d'Andoy, as shown on the map and described here, take the path on the left. After about a hundred metres, ignore the path on the right. Throughout this route along the fort, it will always be on your right. It is not very visible as it is located below the path and hidden by vegetation. This path passes in front of a trail on your right, leading to the entrance of the fort.
(3) Ignore this access to the fort and continue a few steps to re-enter the woods via the barely visible path on the right. Continue around the fort, which will remain on your right, until you reach the end of the path on the left, which will take you back to the fork in the road leading to the fort.
(2) Turn left and continue along the path through the countryside until you reach Route de Limoy.
(4) Cross the road carefully and take the country lane opposite. Walk a few hundred metres and enter the woods, known as Bois de Nanvoie. Shortly afterwards, at the crossroads, turn right and walk through the woods for about a kilometre before rejoining Route de Limoy.
(5) Walk carefully along this road for about 250 metres, then turn right at the milestone and the pine tree next to it. Walk past the farm on your right and go around it, taking thefirst road on the right until you reach a fork shortly afterwards.
(6) Take the dirt track on the left. Continue through the countryside, keeping left at the next junction.
(7) At the next junction, turn right to reach the magnificent white farmhouse of Basseilles.
(8) Leave the white farmhouse of Basseilles, pass Rau du Tronquoy and, about 300 metres further on, carefully cross the busy Jausse road. Go up the path and walk past an isolated house on your left. Continue up the path through the woods until you reach the road. Take this road on the right towards Mont-Sainte-Marie, whose tower you can see a little further up.
(9) When you arrive at Mont-Sainte-Marie, at a crossroads, take a short break to admire the view.
After your break, continue straight ahead at the crossroads and walk up to a small farmhouse on your right. Take the path on the right just before the water collection station and enter a wooded area.
About a hundred metres after leaving the forest, you will come to a crossroads.
(10) Continue straight ahead. Follow this ridge road and enjoy the exceptional view on your left.
(11) After about 1 km, turn right and leave the Route des Haillettes to descend towards the village of Wierde.
After a good hundred metres, you will come to Rue Les Tiennes. Almost opposite, to the right of the electricity pole and to the left of house number 91, take the path. You will cross Rue Les Tiennes again and continue along the path opposite. Cross the Tronquoy stream and you will arrive at Fond du Village road. Follow it for about 50 metres to the left and then turn right and walk up alongside the cemetery wall to return to the starting point (S/E).

One regret, however, was the omnipresent background noise from the E411 motorway, which runs alongside much of the route. Not recommended if you want to enjoy the silence. 

I definitely recommend it.