I have never been to Colorado, so don't know the distances, but recently saw a posting where a row was designed for a shop called Fringe in Salida, Colorado. (I see they have a website so you could check how far it would be for you) I loved the design as the centre block is a bicycle with a Featherweight on the back rack.
One of my great nieces was just proposed to on Pikes Peak, beautiful pictures of that area. Good luck to your son!