Take your pick: lakes, streams, hills, forests, trails, fish, game, snow sports, ice or whatever it is that helps you get that bit of fresh air in your lungs.
If you're the music, food and dancing type, keep your eye on the event listings there's plenty of indoor dancing to keep you warm.
Seasonal programs and equipment like snowshoes, cross-country packages, camping gear, ice augers, even FAT tire bikes for rent from BSU's Outdoor Program Center (OPC).