From skiing and snowshoeing to holiday light shows and local mulled cider, here are all the top things to do this cold-weather season in the Sullivan Catskills. Tis the season to bundle up, wander the snow-covered woods, and sip a hand-warming drink afterward. Or shop till you drop at a holiday market featuring local artisans and food producers. Or hurtle down a snowy slope on skis, or watch your kids yelp gleefully on a snow tube.