grand casse and other mountain peaks along lac des vaches, glacial lake in the french alps

adventure alps bad blue casse clouds cloudy des europe france french geologic geology glacial glaciers gr55 grand grande granite gravel green grey hike hiking ice image lac lake landscape mountain mountains nature path pralognon rain rainy reserve rock rocks rocky savoie sky snow stone storm stormy summer summertime sun sunny sunstar surface surrounded tops tourism trail travel vaches vanoise water weather