Colorado Mountain School was founded in Estes Park, Colorado in 1981. Since then we’ve built a reputation on tens of thousands of days skiing, climbing, mountaineering, and teaching in our backyard—the spectacular Colorado Rockies—and across the globe in other world-class mountain ranges. Our team is highly trained and curates internationally respected courses and trips. CMS is Colorado’s largest mountain guide company, an accredited guide service of the American Mountain Guides Association, and the country’s #1 AIARE avalanche course provider. Our mission is to ignite passionate living through mountain education and adventure. Call us today to begin your adventure.