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Departure from Saint-Mammès station (Transilien line R, on the section between Paris-Lyon and Montereau).
No signposts
(S/E) Take the "Rue du Port de Berville" exit on Platform 1 (the one you get off at when coming from Paris; if you are coming from Montereau, take the underpass). Follow the paved path that runs alongside the railway line. Go down a slight slope, turn right, go through a forest gate and continue straight ahead at the next intersection. At a T-junction, turn left. At the traffic lights, make a zigzag left-right turn to take Rue Pasteur. Continue straight ahead until you reach Quai du Loing.
Yellow markings (rare at the beginning as the route is obvious)
(1) Turn right and follow the river on your left, keeping as close to it as possible.
(2) At number 11 on the quay (signposted "Parking"), ignore an arrow pointing right into a public park and continue straight ahead on the quay. Follow an old lock (information signs on the embankment accessible via a footbridge) and continue to the confluence. A recent footbridge over the Loing (not yet shown on the IGN map) allows you to gain some height.
(3) Turn right and follow the Seine. Cross a large square/car park (market on Sunday mornings) and continue along the Quai de Seine. Pass a landing stage and you will arrive in front of the façade of the Church of Saint-Mammès on the right-hand side of the quay.
(4) Leave the signposts for a moment and go around the church on the right, taking Rue de l'Église and then turning left into a path (not shown on the map) that passes between the town hall (on your right) and the chevet of the church (on your left). Turn left towards the war memorial and the road bridge over the Seine.
(5) Do not take the bridge but continue up the Seine on the Quai de la Croix Blanche (Promenade Sisley). At Rue Lafontaine, turn left to stay as close to the river as possible. Walk past the picnic tables and under the power lines. Continue along the middle of the fitness trail, always keeping to the river side (at one point, ignore a yellow sign indicating to turn right). After the fitness trail (gate on the right), continue straight ahead, staying close to a small road on your right until you come to a fence. Then turn right to reach the road, turn left and you will immediately come to a roundabout.
No signposts
Further on, there are a few old yellow markers, indicating that thePR® used to follow the route described below.
(6) At the roundabout, turn left (yellow cross). Pass in front of the buildings of a water sports centre and turn right onto a wide, stable path. Continue along the river, passing moored barges and a few small private gardens. The path gives way to a narrower path in the woods along the banks of the Seine. At a slightly marked three-way junction (a few trees with several trunks on the left), turn right towards the houses, ignore the path that turns left towards the Seine and reach the road you left at the previous roundabout.
Yellow markings
(7) Make a left-right zigzag and take Chemin des Nanchons (signposted). On this paved road, climb into the woods. Come out above the railway tracks and turn right until you reach a bridge.
Yellow + red and white markings
(8) Take the bridge over the railway tracks to follow theGR®13B. At the end of the bridge, turn left and cross an isolated railway track that enters an enclosed area on the left (no risk of train traffic). Cross a road, take the path opposite and climb up, following a fence on your left at the beginning. Cross the forest, staying on the main path, which is marked, ignoring the less clearly marked paths branching off to the sides.
Shortly after the 96 metre mark, follow a fence on your left again for a short distance. After a sharp left turn, leave the woods and head south along the edge of the woods (on your left) and then between the fields. Pass under the power lines and come out onto a small road which you follow south. After a few metres, when the road turns left, continue straight ahead downhill (signposted "Sens interdit"). Note the Church of Moret-sur-Loing in the distance on the right. Enter Écuelles via Rue Théo Bonhomme. At the "Stop" sign, continue straight ahead and follow the road until you reach a T-junction. Turn right onto a main road towards a bridge (do not take the first road on the right, Rue des Tanneurs).
Yellow signposts
(9) At the road sign marking the boundary between Écuelles and Moret-sur-Loing, turn right to join the towpath of the Canal du Loing (do not cross the bridge). Walk with the canal on your left and a small river on your right. Walk alongside a lock on the canal and pass under the road bridge that follows. Shortly afterwards, the canal flows into the Loing on your left. Continue along the towpath and head towards the railway viaduct, which is clearly visible. Pass under the viaduct and join the Quai du Loing.
No signposts
(1) Turn right onto Rue Pasteur and retrace your steps from the beginning: at the traffic lights, continue along Rue du Port de la Celle, turn right at the first street, pass a forest barrier, turn left and climb gently to reach Track 1 of Saint-Mammès station (S/E) (to return to Paris, take the underpass and head for Track 2).
Visorando member
Very difficult 
Difficult 
