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On the D846 road, at the foot of the Barrage des Dardennes dam, take the small Route des Camps and park in the car park by the lake.
(S/E) Walk along the banks of the lake, on the right, heading north, then take the yellow marked path that leads to Ragas, taking a few steps to the left.
(1) Retrace your steps and take the path that climbs to the left. About 400 m further on, turn left into the Ravin du Cierge, which runs alongside a dry riverbed, following the yellow markings. Pass under the power lines several times. This path is not marked on the IGN map, so the distance and route indicated on the website are approximate. After a few bends, you will arrive at the road called Chemin des Tourris. First turn left then right to cross it and take Chemin des Turcos. Continue for 50 m along the track and you will reach a junction with a path.
(2) Leave the path on the right, which will be the return route, and climb this track for a long time, passing several times under the high-voltage power lines already encountered, without leaving it until you reach a cistern.
(3) Take the path on the right before the cistern. This is contrary to what is indicated on the map, where the path is after the cistern. Climb this path to the top , following the blue markings without leaving it, as you risk getting lost in this maze of white rocks dotted with crevasses, called the Glacier de Pierres.
(4) Arrive at the Pyramide de Cassini, with its magnificent 360° view (ideal for a lunch break).
Do not take the path that descends immediately to the right towards the south, but take the new south-east path that is not marked on the IGN map. Follow the red and yellow markings and stay on this path, which descends through a wood.
(5) At an intersection, not marked on the map, take the path that descends furthest to the right, marked in yellow. Follow these yellow markings. Stay on this path until you reach an old quarry overlooking the road (Chemin des Tourris), which will take you back to Chemin des Turcos.
(2) Take the track on the left and cross the road to rejoin the yellow markings. Descend to the left via the path you took on the way up in the Ravin du Cierge, passing through Le Ragas to reach the car park (S/E).
I'm still delighted with this hike, despite the fact that we'd have to find another central section because the part along the Chemin des Turcos is really, really (!), uninteresting. The first part, which will also be the return section, is really good, but make sure the weather is fine because it won't be good for the return. The section of big stones up to the Cassini pyramid is superb. Thank you
Visorando Member
Difficult 
