Even when the red on the barometer drops into the negatives, the trails are manageable, especially if you are bundled up with lightweight weather gear for aerobic activities. Taking the trails for high intensity cardio like snowshoe running and cross country skiing doesn't mean you need to layer up in your heaviest winter coat, scarves, gloves and triple up on socks. It's important to not overdress—once you get moving you will warm up quickly. It may sound rough, but it's better to start out a little cold. Here are some clothing suggestions that will keep you looking trendy on the trails. And warm enough to get a killer workout in and prepared for races like the Beaver Creek Mountain Running Series.