Follow the "autoroute blanche" until Chamonix. At the first roundabout (where the turn-off to the Mont-Blanc tunnel is), continue straight over towards Chamonix until the next roundabout. Take the last exit to the left towards "Chamonix Sud Aiguille du Midi" until another roundabout. Take the first exit to the right towards "Aiguille du Midi". Follow this road until the next roundabout, take the last exit to the left, then the next left at the following crossroad (the 4 star Best Western Hotel should be on your left). You should now be on the Avenue de l'Aiguille du Midi, we are at nr. 177 on the left-hand side between the "Prestige et Passion" agency and the "Bistro" restaurant.