By car :
Take Highway A8 (if arriving from Aix en Provence, Monaco or Italy), then take the Saint Isidore exit, then the N202 towards Digne. Next, at about 30 KM, take the junction for Auron.
During the winter, be careful with your GPS route! If you wish to use the Restefond or La Bonette passes, they are always closed.
During the summer only, you can use the Grandes Alpes route by the Restefond / La Bonette pass, which is the road with the highest elevation in Europe (2860 meters) or the GR5 footpath which trail crosses the French Alps (starting from Holland), through Lake Geneva and Auron, to Nice.
In both summer and winter, there are 2 regular buses available, that leaves the Nice bus station in the morning and afternoon. They stop at the SNCF train station and also at the Nice International Airport.