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(S/E) From Arbonne church, follow theGR®11south. When theGR®11turns left (east), do not follow it but continue south on the Chemin des Mariniers.
(1) Just before reaching the Chemin de la Plaine de Chanfroy, take a path on the left (due east) which leads up a fairly steep climb to the Virgin Mary tower.
(2) From the tower, continue for another 10 metres, then descend to the right (south) onto the Chemin de la Plaine de Chanfroy. Turn right, then left at an acute angle onto Allée des Fusillés (off the route, monument to the 32 resistance fighters shot in July and August 1944). Turn right immediately to cross the plain via Chemin des Mares.
(3) Turn left (due east) onto Chemin du Rocher de la Reine. Go up to the right (due south) onto Rochers de la Reine, turn left and go back down Chemin du Rocher de la Reine. Continue right and, shortly after, follow a path on the right (facing south; not named on the map) that leads to Chemin du Bois Rond, which you leave on your right. Shortly after, take Route du Bouquin on the left. Further on, the road curves to the right, then to the left.
(4) 100m further on, after another right-hand bend, leave this road and continue left (due east) on a path (not shown on the map) that leads to the Route de la Gibelotte (GR®1). Continue left (east) on this road until you reach the Carrefour du Sapin Rouge.
(5). Turn left and then, shortly after, right onto Route de la Rabouillère to reach a crossroads with Route de la Queue and Route de l'Œil. Follow this road straight ahead. after 200m, turn left (north) onto Route de la Touche aux Mulets, then turn right (east-northeast) to join Route du Louveteau, which you follow to the left (north) and then, at the fork, turn slightly right (east-northeast) to Carrefour du Rocher de Milly.
(6) Take the Route de la Couronne opposite (east-northeast) to reach the Carrefour de Trévise, then continue along the Route des Ventes Gaillot (third on the left) until you reach the Carrefour St-Mégrin (sequoia tree), which you will reach after crossing the Route du Long Boyau. Continue straight ahead (third on the left, still on Route des Ventes Gaillot), follow Route du Coursier to the right for 100 metres and, at the intersection, turn opposite to arrive immediately at Carrefour Tavannes;
(7). Turn right (east) onto Sentier Colinet No. 7 (blue signpost) and then turn left towards Mare aux Pigeons and follow it on your right, leaving the blue signposts. Continue west to rejoin Sentier Colinet No. 7, which you follow to the right until it ends at Route des Gorges de Franchard.
(8). Follow this road to the right (due west). On the left, you will see a quarry shelter. Continue until you cross theGR®11.
(9). Take thisGR® on the left (heading south) and follow it again at the next crossroads, then pass a geodetic marker. 100m further on, when theGR® turns right, leave it and go straight ahead onto the Route de Saint Mégrin. Follow this road again at the next crossroads, at a pond on the left.
(10) Continue straight ahead at the next crossroads until you reach the intersection with La Route des Basses Plaines.
(11) Follow it to the right (west). About a hundred metres further on, take a path on the right called Route du Loup. A little to the left is a cave that served as a shelter for the inhabitants during the 1870 war. Continue to the Route des Hautes Plaines. At the crossroads, on the right, there are two canopies with engravings.
(12). Follow Route des Hautes Plaines to the left to join theGR®11, which you take to the left (north-west then west). There are numerous traces of quarrying.
(13) At the intersection with Chemin de Milly, leave theGR®11and continue straight ahead (north-west), then at the next fork, turn left (west) towards Arbonne. Cross the D409 and continue straight ahead to reach the church square.
A very approximate description of the route, particularly in the initial sections. The descent after the tower is almost impossible to navigate without guidance, as the only instruction is to "walk for about 10 minutes after the tower", which is particularly vague. However, with the right equipment and a GPS device, it is fairly easy to find. Please note that the path indicated near the monument to those who were shot is closed. You should reach this monument, pass it on the left and take the adjacent path that runs alongside it on the right.
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Difficult 
