In reply to Noangel72:
Snowshoeing is very popular here in Ariège (Pyrenees), and after early-mid December there should be plenty of snow cover to keep you happy. I've even been out exploring on snowshoes right from the house but that isn't possible on many occasions during the winter - usually you'll be better off driving 10-30 minutes in different directions to find different starting points at higher altitude. We even have dedicated snowshoeing guidebooks to the trails around here, which guests find very useful.
Having said that I'm sure there are a zillion places you could pick, depending on other criteria such as accessibility, amenities, variety, etc. At that time of year you would most likely be able to reach the summits of the highest nearby peaks - maybe 2000-3000m without running into crevasses, dangerously low temperatures or major acclimatisation problems, which would be another consideration if you're also considering venturing to higher ranges.