Blue Mountain is an unincorporated community in Moffat County, in the U.S. state of Colorado. Blue Mountain is located on U.S. highway route 40.
Blue Mountain was founded sometime after 1910. The Blue Mountain, Colorado, post office operated from September 1, 1949, until January 31, 1957. Blue Mountain is named for a nearby mountain, which is also called Blue Mountain.
The post office in Dinosaur (ZIP code 81610) now serves Blue Mountain addresses.