Northern France is certainly not the part of the country that is best known for skiing - that would be the Alps in the southeast. But there are some alpine and cross-country skiing resorts in the northeast, for example in the Vosges region. You can see a list of the ski areas in Vosges here: http://en.wikipedia.org/wiki/List_of_ski_areas_and_resorts_in_Europe#Vosges