Start from the car park of the Noyer Courteau municipal hall (large green-clad building) along the D99.
Yellow signposts
(S/E) With your back to the large building, turn left (west) along the D99. After about 100 metres, at Rue des Champs on the right-hand side, turn left (south) onto a farm track. At the next junction (yellow signs with two sides), turn left.
Yellow + blue markings
(1) At the T-junction, turn right. Pass a pumping station on your right and continue straight ahead towards a wood. After about 100 metres, at a fork (not shown on the map), turn left.
(2) Ignore a path that branches off to the right into the woods and stay on the edge. After about 150 metres, enter the woods. At the fork that appears immediately, turn left and stay inside the woods but on the edge. Further on, turn right, enter the woods and climb steeply.
Yellow markings
(3) At the top of the hill, turn right. Wind your way along a flat path with small rocks protruding from the ground, ignoring vague trailheads on the right. Note the boulders below on the right and finish in a flat landscape.
(4) At the three-way junction, turn left (south-southwest). Leave the woods, pass under the high-voltage line and continue south, keeping parallel to it.
Yellow + red and white markings
(5) At the T-junction, turn left (ignore a yellow arrow pointing to the right; twoPR® trails intersect here). Follow theGR®1, ignoring the trails branching off to the sides, and enter the woods again. Continue along the edge of the woods on your right. At a large intersection, turn left and continue along the edge of the field on your left.
Yellow markings (rare)
(6) At the next junction, turn left (north-east) along the edge of the woods (let theGR®1continue straight ahead into the woods). Continue between the fields, ignore a path on the left and take the first path on the right (a wide grassy path heading south-east). Ignore a path on the left, enter the woods again and descend slightly.
(7) At the bottom (yellow sign with two sides), turn left at an acute angle. At the next fork, turn left. Turn right with the path and ignore a path on the left. Further on, walk along the edge of the woods on your left, then enter the woods.
Yellow + blue markings
(8) At the fork, turn right. Walk north-east and ignore all paths branching off to the sides, alternating between the undergrowth and the edge of the woods on your left. Start to descend and, at a crossroads, continue straight ahead and continue downhill on a wide path that quickly becomes stony.
(9) Note the Sablière d'Orgemont on your right and continue straight ahead on the path of the same name (tarmac road). Cross the Chemin des Glands on your right and descend with two successive bends. Cross the Chemin Potier.
Yellow signpost
(10) At a signpost, continue straight ahead on the tarmac (ignore the blue sign and the yellow sign for a secondPR® trail that branches off to the right). Cross the D449 at the pedestrian crossing on the left and take the Rue de la Porte de Bouray diagonally to the right (bus shelter on the right). Ignore Rue des Faubourgs on the right and, at the next crossroads (cross), turn left and go down Rue Saint-Germain. Pass an old well on your right and, at the next fork, turn left onto Rue Forget. Cross Chemin de l'Enfer, continue on Chemin du Robinet and you will come to a small car park (information sign).
Yellow + bluesignposting
(11) Continue straight ahead and go through a metal gate. Walk along a pond on your left until you reach a crossroads (pasture on the left).
(12) Follow the path on the right, which is stabilised with wood chips (not shown on the map). Walk alongside a river on your left and note the view of Itteville church on your right. Ignore a path coming from the right and continue straight ahead to the Aveau observatory. Retrace your steps back to the crossroads.
(12) Turn right, pass a few small rocks across the path, follow the pasture fence on your left and arrive at the Fauvettes observatory. Retrace your steps to the crossroads.
(12) Continue straight ahead (south) and pass through the metal gate again.
(11) With your back to the gate, turn right (west) and follow a farm track along the edge of the field on your left. Pass a small house on your left.
Yellow signpost
(13) At the next intersection (signpost), continue straight ahead on the farm track (ignore the blue sign and the yellow sign for a secondPR® trail that branches off to the left onto a field path). Walk along the edge of the woods, following the fences and ignoring a path that branches off to the right towards the Juine River. Continue along the edge of the field on your left, then follow a fence on your right at a short distance. The path narrows and runs strictly alongside the fence. At the end of the fence, continue slightly to the left into a wasteland, then enter a wood.
(14) Go through a forest gate and follow the D449 road to the right: either on the left-hand shoulder, which is unfortunately very narrow, or on the right-hand shoulder, which is wider with a marked path along the wall of a property. At the roundabout, turn left onto the D99 towards Lardy and you will quickly reach the car park (S/E).