The Chamonix Valley has got several Tourist Officies. The main one in Chamonix has information for the whole Valley. If you are looking for information about the smaller villages you can go straight to their respective tourist offiices.
Chamonix
Chamonix Tourist Office 85, place du triangle de l'amitie 74401 Chamonix Mt-Blanc cedex Tel. 33 (0) 4 50 53 00 24 Fax 33 (0) 4 50 53 58 90