Not to put a dampner on your idea but do you realise that there will be feet of snow and unless you have very good winter gear you'll probly freeze to death, my folks live near the alps and they can get a foot of snow over night nothing surprising to them and minus 10c and more. If you like that sort of challenge then go for it, I've read of guys riding in Siberea in winter and I'm sure it's never that cold in France.With the right gear and you can ride anywhere in the world no matter how hot or cold.