Park in the car park at the entrance to the village of Les Gourmiers.
(S/E) Cross the stream and take the tarmac road, following the signs (green dots) towards the valley opposite the car park (west), Col de la Coupa, La Gardette.
Follow this tarmac road for 500m. At the end of the tarmac road, you will reach the hamlet of Les Tomelles.
(1) Take the path on the right, marked with green dots, towards "La Coupa". You will reach a crossroads.
(2) Turn right, still heading towards La Coupa. Leave the path that goes straight ahead towards La Gardette (marked with red dots). Continue to follow the path marked with green dots that runs alongside the Gorge torrent.
Continue along this path to reach the Cabane du Vallon.
(3) Continue along the fairly steep but well-marked path to reach the Col de la Coupa
(4) Retrace your steps to return to the Gourniers car park (S/E).
21/08/2024: It is necessary to follow the YELLOW markings from the start and not the green ones, which are now obsolete, to avoid passing through a sheepfold.