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Departure from Lagny-Thorigny station (Transilien line P).
(S/E) Exit the station on the north side and follow theGR®14A(poorly marked...). Take Rue de la Madeleine, which climbs quite steeply. Higher up, join Rue de Claye (D418) in a curve and follow it north. Pass a first crossroads.
(1) At the next crossroads, turn left onto Rue des Guayes (signposted as a dead end). Pass a few houses and continue straight ahead on the stony path (closed by a barrier) which descends into the fields. When you reach a crossroads, take the path almost opposite (a slight zigzag to the right and left) and continue on the path between the fences (ostrich farm on the right).
(2) After passing the corner of the fence, take a path heading north-northwest at the boundary between the fields and the forest (leave theGR® trail on your right along a fairly deep ditch and on an unmaintained path). After about 450m, turn right onto the well-marked path (muddy in wet weather) that climbs into the forest. You will arrive at the Aqueduc de la Dhuys, recognisable by its two paths separated by a grassy median, and follow it to the left for about 100 metres.
(3) Leave the aqueduct and take the path on the right which, after a right-hand bend, quickly turns into a lane leading to the village of Carnetin. Pass the pretty little church and continue opposite towards the cross which marks the viewpoint (information panel on the first battle of the Marne).
(4) Continue north-east and descend a steep but well-maintained path to the D418. Cross it and continue straight ahead on the dirt track which joins a good paved road. Turn left to go around the fence (danger of underground quarries) then right onto one of the paths that descends towards the Marne.
(5) Turn right and follow the river on your left. After about 2.5 km, leave the wooded area and you will arrive in farmland. Leave thePR® trail as it climbs up to the right and continue straight ahead along the Marne for another 400 m.
(6) When following the riverbank requires you to take a poorly marked path, stay on the correct path, which returns slightly back. At the next crossroads, turn left (you will rejoin thePR® on the map). Leave the first path that climbs to the right, then another that goes left towards the Marne. Take a right-angle turn and reach the railway line. Turn left and follow it to the riverbank. Turn right and pass under two bridges in succession.
(7) After the second bridge, turn right onto the steep climb that goes up the old railway line (very steep, difficult in wet weather). Then turn right to cross the bridge over the Marne and descend on the right. Continue south on the correct path that passes in front of the Ermitage (cabaret).
(8) At the crossroads, take the road on the right that descends towards the Chalifert lock. Before reaching the lock, turn right along the basin to take a look at the Chalifert tunnel, the last section of the Meaux canal at Chalifert.
Rejoin theGR®14Aand follow it along the Marne to the Jardin des Sculptures de la Dhuys.
(9) After taking the time to admire the sculptures, continue downstream on theGR® which follows a paved road (shaded, very little traffic). N.B. You may prefer an irregularly maintained path that winds between the Marne and the road. When you reach the Moulin de Quincangrogne, continue on the road until the next intersection.
(10) Leave theGR® and take the path that leads to the banks of the Marne. This is a narrow, well-marked path, but it can be dangerous as it is very close to the edge of the riverbank, with some areas that have collapsed due to erosion and flooding from the Marne. Follow the banks of the Marne until you reach the paved road. Pass the water sports centre and continue to the first bridge over the Marne: cross the bridge and continue straight ahead to the station (S/E).
Visorando member
Moderate 
Easy 
Tourist office
