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Departure from the first car park at the exit of Brabizon on the road to Fontainebleau.
(S/E) Take the Route des Gorges d'Apremont diagonally (south-east), which bypasses the small rocky outcrop on the left where the Millet-Rousseau monument is located.
(1) At the three-way junction after a slight climb, take the path on the right which descends on the other side of the aforementioned rock formation. It crosses the blue circuit no. 6 and joins a crossroads. Continue straight ahead (west), keeping the water tower on your left, until you reach a crossroads.
(2) Turn left onto Route des Brulis (a beautiful cobbled section) which joins Route de la Perspective de Rochefort a little further on. Turn right onto Route de la Perspective de Rochefort. This road climbs and then descends to Carrefour des Ventes Alexandre.
(3) At this crossroads, take Route des Monts Girard briefly (which runs alongside the fence of the cut-off area) and rejoin Route de la Perspective de Rochefort on the right, which climbs back up to the plateau and leads directly to the Camp d'Arbonne viewpoint (bench).
(4) To the left of the bench (looking towards the viewpoint), take a path that descends rapidly into the valley (to the left of the tree with the "point de vue" sign). Once on the flat, the path widens (further on, a sign indicates that this is the Route Tournante des Ventes Alexandre). Cross a path and turn left. Join the D11, cross it and continue straight ahead (Route du Loup).
(5) At the next crossroads (Carrefour du Loup), turn left onto Route du Châtelain (2nd road on the left) and continue to Carrefour des Trois Frères after crossing the D409.
(6) Turn right onto Route du Cul du Chaudron, which joins Carrefour de la Plaine de Macherin (Isatis car park). Large ONF forest throughout.
(7) (Isatis car park). Continue along Route du Cul du Chaudron, which leads to Route des Gorges de Franchard.
(8) At this point, you are at the foot of a small climbing massif called "Franchard-Sablons" (red and blue markings). The map indicates that the path continues slightly to the right of the main rocks. The path is not very visible at the crossroads: walk a few metres to the right, and it starts in the ferns (which are invasive in summer). It is very visible, climbs up a small thalweg, crosses a small ridge and then climbs back up towards theGR® trail, which you join at the "Route Darwin" sign.
Alternatively (old description), climb up the rocks on the left, keeping to the right of them (you can clearly see the aforementioned thalweg), until you reach a bulge between two small valleys. once you have reached the ridge (around 7 on plot number 772 on the map...), you can clearly see theGR® 11 below.
(9) Take this well-marked path (red and white) on the right, which descends steeply onto a wide path that it crosses, and continues opposite. You are now in the Rochers des Sablons, where theGR® winds its way after climbing up a ridge. You will soon see the quarries on your left (there are some particularly well-preserved low walls). The trail goes around the 110-metre contour line on the right, between some rocks (ignore the paths on the right), then descends towards Arbonne.
(10) Take thefirst path on the left (before a barrier 20 m to the right): this is the Chemin des Rochers (no sign). Then turn right onto the Chemin de la Cible and leave the Chemin de la Basse Plaine on your right.
(11) At the Carrefour de la Cible, turn left (Chemin de la Basse Plaine). The path then enters the national forest (boundary markers). At the next crossroads, take the Route du Louvard on the right, which leads, after a fairly steep climb, via the Route de Hurlevent on the right on the plateau, to the Hurlevent viewpoint (bench).
(12) To leave from this point, return to the Route du Louvard and continue to the right. Leave a path on the left (Route Jussieu, near an ONF logging area): at this point, the Route du Louvard descends to the right between rounded boulders and rejoins the Carrefour de la Louve. The Route du Louvard continues straight ahead towards the Milly rock and descends in the same way. Cross the Route de Milly in Fontainebleau, and the path then leads to the Chemin des Pieds Pourris after crossing the open space of the Vanne aqueduct.
(13) Continue left along this path. After climbing up to the Queue de Vache plateau, it descends to the Route de la Goulotte. Continue straight ahead across the flat area of the Touche aux Mulets (beautiful ponds, sometimes wet), and join the Route de la Gibelotte, which you take on the left (keep heading in this direction until you reach this road, which you will come to after going down and up a small dip).
(14) Follow the Route de la Gibelotte, cross the Carrefour du Sapin Rouge. At the Carrefour du Sapin Blanc, take the Route Alexandre (third on the left). When you reach the Route du Blaireau, follow it, turning left. Cross the Route de la Princesse Marie and join the Carrefour du Blaireau.
(15) Immediately turn left onto Route de la Poche, which descends gently and leads to Route de Milly in Fontainebleau. Take Route du Rocher de Milly opposite. At the next crossroads, continue along Route du Rocher de Milly diagonally to the left until you reach the Rocher de Milly crossroads.
(16) Continue along Route du Rocher de Milly diagonally to the left (north-west). This will take you to Route de Trévise, then a little further on to Route des Semis, which you take on the right. At the next crossroads, you will find Route Fabre: turn left. At the next two crossroads, continue straight ahead until you reach Route des Gorges de Franchard.
(17) Turn right. At the next intersection, take a sharp left onto Route du Carnage. Descend into the Gorges de Franchard, cross Route Amédée and climb back up opposite. Reach a small pass and descend via wooden steps.
(18) At the bottom of the descent, take thesecond road on the right, Route de Bois d'Hyver. Climb up to a plateau, cross Route Sainte-Fare, then descend to the D409. Cross the road and continue diagonally to the left (north-west) along Route de Bois d'Hyver. Cross several paths and join the Carrefour de Bois d'Hyver.
(19) Continue along the same road (third on the right). Climb up to the Monts Girard plateau until you reach the Carrefour du Chêne des Marais (bench). Opposite, takethe third road on the right, Route Marie-Thérèse, then turn left onto Route des Acacias. At the next crossroads, continue straight ahead until you reach the André Billy viewpoint (benches).
(20) From the viewpoint, turn left onto theGR® (red and white markings and blue trail no. 6). After about 500 m, turn right onto Route Tournante des Ventes Alexandre (GR®) and descend quickly (stairs).
(21) At the next crossroads, turn left onto Route des Gorges d'Apremont, which will take you back to the car park. When the road becomes narrow and rocky and disappears slightly, pass to the left of the small ravine where the path disappears. You will find it again a little higher up towards the ridge, and it will then lead you back to the path you took on the way there.
(1). Turn right, then left to return to the starting point (S/E).
and it took us 6 hours with 2 coffee breaks and a lunch break, i.e. 5 hours of walking.
Visorando member
Easy 
Moderate 
