Park in Aillon-le-Vieux (car park on the small square near the church).
(S) Go up opposite the church, cut across a bend in the road via a shortcut and continue straight ahead.
(1) After the last house, turn right and climb up the path on the right at the edge of the woods.
The climb is steep but steady; you will come out of the forest, then climb again to reach the remains of a lake.
(2) Turn right towards the Col du Colombier.
(3) At the pass, you have two options:
- stay to the right and head straight to the Chalet de Rossane crossroads,
- climb up to the left, which is the route shown on the map, to reach the summit of Mont Colombier via a slightly exposed passage.
(4) Return by the same route to the previous crossroads.
(3) Turn left and head towards the Chalet de Rossane.
(5) Pass this long building and descend into the valley on the right. Turn right after 400 metres to reach the old chalet de la Cave
(6) Be careful, the path is not very visible, but look for a few diamond-shaped Laune signs. After a short climb, cross a meadow to reach the Chalet de la Bottière.
(7) Then follow the regional park signs to the hamlet of La Bottière.
(8) Take the road on the right to reach the car park at Aillon-le-Vieux (DA).