Chamonix-Mont-Blanc, more commonly known simply as Chamonix (formerly also spelled Chamounix), is a commune in the Haute-Savoie departement département in The-Rhone rhône alpes region-in South. Eastern france it was the site of The First winter olympics. in 1924he town of Chamonix is served by French Route Nationale 205 (RN 205), nicknamed the Route blanche, or white route, due to its snowiness. This is an extension of French autoroute 40 (A40), similarly nicknamed the autoroute blanche, which ends at Le Fayet, a village in the commune of Saint-Gervais-les-Bains.