While staying across the street from Snowmass Base Village at the Tamarack condos, we shopped at the nearby Clark's Market (there are also other locations in Aspen, Buttermilk, and other ski towns in Colorado). We found they stocked TONS of gluten-free items, including in the frozen section. They have too many items to list here, but suffice it to say, they have all the major brands: Udi's, Amy's, Canyon Bakehouse, Applegate Farms (chicken nuggets and breakfast sausage), gluten free pastas and frozen pizzas, and just about any item you'd be looking for. They also had a nice assortment of organic produce. Considering we were on vacation and not planning to cook all our own meals (I've written reviews for some of the places we dined out in Snowmass and Aspen here on this website), this market is more than sufficient for what you'll need. We had brought a few favorite food items from home, but if we'd known all that was available at Clark's, we probably wouldn't have packed a thing.