Driving from Nice take the direction of Digne Grenoble onD6202. Before entering the village of Puget Théniers , you will see on your right a restaurant called "Les Accacias" ahead a speed limit at 70km after take the first street on your right called Chemin du Planet , then 30 meters further the first on your left Montée de la Colette , climb up the hill for 500 meters , we are at the 511 there is a private car park in front of a black gate .For the gps try "Colletta" or "Montée de la colette" .
Coming from Digne enter the village and follow the railway you will see a petrol station on your left (total) then on your left 300meters away a small street chemin du planet drive on it then 30meters and your left montee de la colette follow the street until you find 511 there is a private car park with a black gate you 've arrived
Have a nice trip.