Mesa Verde National Park
Mesa Verde National Park is a recognized dark sky location in Colorado for stargazing and astronomy activities.
It is designated by DarkSky International (IDS) as a Dark Sky Park, which is internationally recognized for preserving a dark sky experience.
Type
As a U.S. national park, various camping options may be available, including frontcountry, dispersed (boondocking), and backcountry (backpacking/primitive). A permit may be/is required.
UNESCO
Mesa Verde National Park is also a UNESCO site.
For more info, see their website. See also all dark sky places in CO.