Take the Lyon Chambery Turin A43 motorway. Exit at "Saint-Jean de Maurienne".
In Saint-Jean de Maurienne, follow the direction "Vallée de l'Arvan / Col de la Croix de Fer" for 10 miles, then turn left to "Montrond" and "Le Chalmieu".
There are 12 miles from "Saint-Jean de Maurienne" to "Le Chalmieu" which is situated 1000m higher than Saint-Jean.