Although there are many unreal ski options in Colorado, there are generally only a handful of ski resorts that would be considered the most "upscale" and luxurious. In this guide, we will break down AspenSnowmass, Vail, Telluride and Beaver Creek, the Big 4 luxury ski resorts in Colorado and what makes them unique.  We go in-depth on terrain variety, skiing, dining, après, ski school and more.