This layout wasn't in the show guide, so I was not sure of scale or even the name (Gunsite is the name on the depot board in picture 2).
Why didn't I ask? Well, the only reason I usually get a show guide is to fill in these titles and descriptions for my website; so to save carrying it around I generally buy it on my way out. As a result I didn't know this one wasn't in it until several days later ...
However, the operator at the time of my visit stumbled on my site and contacted me to confirm that it is indeed called Gunsite and is On30, mostly using modified r-t-r stock. There is more information on the owner's website at Gunsite, Colorado