Motorway until Grenoble, then RN 91 “Col du Lautaret”. 7 km after the pass turn right for Le Lauzet then Les Boussardes.
Coming from Italy :
Motorway until Oulx (35km from Briançon) then go over the Col de Montgenèvre RN 94, go through Briançon in the direction of Grenoble RN91. 21 km after Briançon turn left for Le Lauzet then Les Boussardes.
Coming from the south of France :
Aix-en-Provence / Sisteron motorway until Tallard, then Embrun, Briançon RN 94, go through Briançon in the direction of Grenoble RN91. 21 km after Briançon turn left for Le Lauzet then Les Boussardes.