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The hike starts at the car park on Avenue de la Gare in La Ferté-Milon.
(S/E) Head towards the level crossing.
GR® markings (red and white)
Turn left, cross the level crossing and continue along Rue de la Chaussée until you reach the crossroads. Cross Rue de la Chaussée at the pedestrian crossing and continue along Rue des Galets. At the top of the hill, turn right into Rue de Bourcq.
(1) Continue along this street, which turns into a farm track and then a path at the entrance to a wood. This path descends into a small valley where it turns right in front of a pond. At the crossroads, at the corner of the pond, theGR®11continues straight ahead.
No markings
(2) Leave theGR® and turn left. The path turns left 200 metres further on to cross the dyke separating two ponds. Continue to the right in front of the large building. The path follows the bottom of the valley to join a tarmac forest road at a 180° bend.
(3) Turn left to continue following the bottom of the valley along the forest road. After about 1.5 kilometres, at the stop sign, turn left onto the D1380 to follow forest plot 1030.
(4) At the crossroads 400 metres further on, turn right onto the track separating plots 1023 and 1028.
At the next crossroads, continue straight ahead, slightly to the right, between plots 1019 and 1020 until you reach a junction with a tarmac forest road.
(5) Cross the road and continue straight ahead along the path crossing plot 968. This path leads to a star-shaped crossroads where the Route Droite passes (see sign). This is the Carrefour des Tourneurs, which is not signposted on site.
(6) Turn sharply into the first track on the right that crosses plot 968. After one kilometre, pass Carrefour Loliée. Continue along this track (called Laie du Puits des Sarrasins) until you reach the edge of the forest, where you turn slightly left onto a farm track.
GR® trail markers (red and white)
(7) Continue straight ahead to enter Oigny-en-Valois via Rue des Bourgeois. This road turns left (it is not marked on this section). You will pass the village church with its small cemetery, where the Charpentier Mausoleum is located. Turn right onto Rue Saint-Antoine (where you will find theGR® markings again), which ends in a cul-de-sac in front of a property gate.
(8) Continue straight ahead along the grassy path running alongside the large hedge surrounding this property. The path descends into the forest to the Carrefour du Fond d'Enfer (sign fixed to a tree trunk).
(9) Take the second path on the left. The path continues downhill, passing a pond visible on the left through the vegetation, then turns right to follow the bottom of the valley. At the crossroads, 200 metres after the turn, theGR® turns right.
No markings
(10) Continue straight ahead for 400 metres to the next crossroads, where you turn left to cross the bottom of the valley, passing in front of a pond. Then turn right onto a path that climbs up the hillside 200 metres further on. After a short stretch on the plateau, the path descends again to reach the D17 at the entrance to the hamlet of Le Buchet. Turn right onto the D17 towards the first house.
(11) Turn sharply left onto the grassy path in front of it. After 100 metres, turn right onto the path leading down into the valley. It crosses a marshy area, then climbs up to the plateau in wide curves. It continues across fields in a south-south-westerly direction to the village of Troësnes, where it ends at a crossroads in front of the town hall.
(12) Turn right onto Rue du Moulin (D79) and continue to the crossroads in front of the old Silly-la-Poterie railway station.
(13) Turn left into the lane leading to the Port-aux-Perches boat launch ramp. Turn right to pass in front of the Port-aux-Perches river station and then follow the towpath along the canal. Turn right at the footbridge to join the D17 in front of a pumping station.
GR® trail markers (red and white)
(14) Cross the D17, then turn left into the gravel lane going up to the right of Rue du Chemin Vert. This will take you past the Château de Silly-la-Poterie. Turn left and go back down into the valley. At the junction of Rue de l'Abbé Latz and Rue Louis Toulot, take a look at the stone commemorating Abbé Latz. TheGR®11turns right.
No markings
(15) Continue straight downhill to the D17. Cross the road and take the grassy path opposite leading to the Canal de l'Ourcq near the Mosloy footbridge.
(16) Turn right and continue along the towpath until you reach Rue de la Cité de la Ferté-Milon.
(17) At the bridge, turn right. After another 500 metres, you will arrive at the car park on Avenue de la Gare (S/E).
Visorando member
Moderate 
Very difficult 
