Copper Mountain is a mountain located in Summit County, Colorado, about 75 miles (121 km) west of Denver on Interstate 70. Opened in late 1972, its most notable use is as a ski resort, owned and operated by Intrawest until Dec. 2009, when operations were sold to Powdr Corporation. The ski area features beginner slopes on the western side of the mountain, intermediate slopes in the center, and expert terrain on the eastern side.