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The starting point is at the Port de Chantecoq car park.
Yellow and black markings.
(S) Head west, go through the roundabout and take the path between the hedge and the barbed wire fence, then cross a wooden bridge.
(1) Turn right until you reach the observatory.
(2) From the observatory, return to the crossroads after the wooden bridge.
(1) Continue right into the forest, following the Étang des Landres pond on your right. At the edge of the woods, cross the meadow diagonally, pass to the right of the grove and continue to a new observatory.
(3) Continue west, cross the dyke between the two ponds and continue along the path. Pass in front of the "Les Clés d'Émeraude" lodge.
(4) At the crossroads, turn left and a few metres further on, turn left again onto the stony path between the cultivated fields heading south-east. Pass between the Grand Coulon and Forêt ponds and join the wooden observatory on the left.
(5) Retrace your steps and continue to the left. Follow the edge of a field and continue along the path to the crossroads at the entrance to the campsite.
(6) Turn right and continue to the next crossroads (elevation 132) after passing a few houses before the village of Châtillon-sur-Boué.
(7) Turn left onto Rue de la Loge and take the next right.
(8) Turn onto the path on the right and join the D55 road.
(9) Follow the road to the left (GR®14B) and cross the D13. Turn left after a few metres and head for the weather station on the right. Continue on the left, along the cycle path on the dyke or on the path at the bottom of the dyke until you reach the car park, keeping the Lac du Der-Chantecoq on your right (S/E).
Nice walk around the ponds, but there's a small problem: my GPS says it's 7.5 km, but I can't find the 12.16 km route. I must have got confused between points 6, 7 and 8, but that doesn't account for a 4.66 km difference, does it?
Visorando member
Easy 
AONB
