Have you ever heard of Nordic skating? If not, check out this guide: http://away.com/activities/nordic-skating/nordic-skating-destinations.html. Conditions permitting, Lake George is a great place to try it out. (Check with http://www.nordicskater.com for ice conditions and if any upcoming events match your dates.) You might also consider cross-country skiing or a snowshoe safari at places like Friends Lake or Gore Mountain.