Depart from the small car park at the foot of the Col de Vassieux (there is space for two or three vehicles). Please note that the road to get there is quite rough, so if your car is low to the ground, do not attempt it. It is better to walk up to the pass from the Museum of Prehistory, but this will add about ten kilometres to the route.
(S/E) From the car park, climb up to the Col de Vassieux via the only visible path (heading south).
(1) At the Col de Vassieux, turn left towards the But de l'Aiglette and, after about 40 metres, turn left onto a barely visible path through the mountain pastures to join the Chemin des Charbonniers, which you can see at the edge of the woods to the north-east.
(2) Follow this path to the left, go straight ahead at the first crossroads and continue to the next one (5 paths).
(3) Continue on the Chemin des Charbonniers to the right (south-east) until you reach theGR® de Pays at the crossroads with the forest road.
(4) Turn right onto theGR® de Pays, continue straight ahead on the forest road for about 2km, then turn right at the fork (elevation 1397).
(5) Take the hairpin bend to the right and continue climbing along the forest path for another 2 km or so.
(6) At the end of the forest path, things get tricky as you arrive in a beech forest with paths in all directions. Finish the climb by turning left and following a few hairpin bends to reach the summit about 50m to the south-east. The summit is marked by a boundary stone with a red cross.
Once you reach the summit, continue right towards the south-east on the path overlooking the Rochers de l'Aiglette. Be careful if you decide to walk along the ridges, especially if you are with children, as the cliffs are very steep. Reach the But de l'Aiglette at about 600m.
(7) Once you have reached your destination, you can begin the descent towards the Col de Vassieux via the main path (heading north-east). Please note that the descent is very steep, but signposts will guide you along the way.
Reach Col de Vassieux.
(1) Descend to the right to return to the car park where you started (S/E).