Park in the car park at the Chantecoq site.
(S/E) With your back to the car park, cross the roundabout carefully (follow theGR®14B-GR®15signposts) and head straight ahead onto the path running alongside the barbed wire fence. Cross the wooden bridge and turn right to reach the first viewing point at the Étang des Landres.
(1) Walk back 100 m and turn right. At the edge of the woods, turn left into the meadow to reach the Grand Coulon No. 1 viewpoint.
(2) As you leave the viewpoint, turn left along the reeds, enter the woods via the boardwalk and, after 200 m, turn left onto the white path (GR®14B-GR®15). Walk past the “Au milieu de nulle part” lodges.
(3) Turn left, continue along the white path (leaving theGR®) until you reach the Grand Coulon Observatory No. 2 on the left.
(4) Continue left as you leave the observatory, along the white path, and walk past the “Le Clos du Vieux Moulin” campsite.
(5) Take the tarmac road to the left with care, cross the D13 at the pedestrian crossing, climb the iron steps and join the cycle path.
(6) Turn left (GR® 14B -GR®15) and go straight on to reach the car park at the Chantecoq site (S/E).