i think it may be part of the rockies. it is located pretty much right next door to pikes peak just to the southwest of colorado springs in colorado. it's 9500 feet tall or so and immediately recognizable cause it's got dozens of antenna on top and is technically unstable cause they've carved so much out of the inside of it that it's a little too hollow.
i do know it is located literally right across the street from fort carson, in fact they share the same highway exit.
you can see cheyenne mountain from most of colorado springs and maybe from miles away, largely cause the area immediately to the east is relatively flat.
it's covered in trees, apsen and pine and the dirt is this odd yellowish, red. or maybe it just looks that way contrasted with the green of the trees.
it is surrounded by dozens of other mountains of varying height.
hope that helps