You are in a protected area! See the regulations in the practical information section.
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Access from Abondance, heading towards "Lac de la Plagne" then "Follebin" and "Chapelle Saint-Théodule".
Parking is available just beyond the Chapelle Saint-Théodule, in a small car park near a fountain and an information board. The tarmac road then gives way to a stony track.
The route is generally unmarked, except for the short section between Lenlevay and the base of the Arête de Coicon, where you will find red and whiteGR®5markings. There are directional signs at important points and marker posts up to Lenlevay.
(S/E) Take the track that branches off to the right of the information board, continuing along the route taken by car (south-east). At a nearby fork, take the left-hand path and pass by an oratory. At the signpost that appears immediately, follow the direction of Lenlevay and take a steep track into the forest. Cross a stream, continue on the steep track and reach the Chalet du Covillet.
(1) At this chalet, as at the following chalets of Bailly and Jouly Bas, turn left towards Lenlevay (signs) and then turn right to continue south-east. Climb a steady slope, less steep than before, through a forest that gradually thins out, then through mountain pastures. You will come to a crossroads at a place called Lenlevay: in the distance opposite, between two peaks in the foreground, is the Haute Cime (the westernmost peak of the Dents du Midi).
(2) Turn left towards L'Etrye (sign, red and white marker post). At the mountain chalet, make a hairpin turn to the left and then follow a wooden sign indicating the direction of Mont de Grange. Climb under the pine forest and, when the canopy clears, look for a sign on the left indicating "Altitude 1840m".
(3) Turn left towards Mont de Grange via the Arête de Coicon (the indicated time of 2 hours is generous). Take a narrow path that climbs steeply between the shrubs. Continue along the grassy ridge. After a flat section, go around a buttress on the left, climbing very steep switchbacks.
Then continue steeply along the ridge or slightly below on the left (steep drop on the right) towards a sort of peak which is not yet the summit. Go past the peak (cairn) and cross over to the other side of the ridge. Traverse, continue through the middle of a rocky chaos and make a few short switchbacks to reach the summit (cross, orientation table).
(4) The descent is via the same route on the ridge.
(3) At the bottom of the Coicon ridge, turn right onto the track.
(2) At the crossroads after the Lenlevay mountain chalet, turn right and, from this point, follow the signs for "Oratoire Les Trables". This will take you back to the car park where you started (S/E).
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Very difficult 
Easy 
Moderate 
