Cheyenne Mountain North Portal

USA / Colorado / Fort Carson /

The "front door" to Cheyenne Mountain and the underground NORAD Cheyenne Mountain Operations Center. The tunnel entrance is 29 feet wide and 22.5 feet high. The famous 25-ton blast doors are one-third of a mile into the mountain and open into the side of the tunnel. The "back door" (South Portal) is at the end of the 0.9-mile tunnel.
Nearby cities:
Coordinates:   38°44'39"N   104°50'46"W
This article was last modified 12 years ago