From the Tourist Office of Cluses (21 main street) you will have to take your vehicle to go to the village of Saint-Sigismond (15-20 minutes away).
From the A40 Geneva-Chamonix motorway:
take exit 19, then follow signs for Cluses - center ville.
From the center of Les Carroz, go down to the village of Arâches, then turn right after the Church towards La Frasse, Saint-Sigismond.
Arrived at Saint-Sigismond, take the road which goes up to the right in the direction of Agy.