I would have thought there would have been a few gems hidden out here in the vacation spots - overnight in vail and striking out in all the usual places.
About the only place in the mountains I tend to see girls advertise for on a somewhat regular basis is Blackhawk. Then of course you have your girls in Grand Junction.
So as the others have said, it is always best to find someone that catches your eye and make plans for them to visit you in whichever town you are staying in.
Yeah you'll be paying outcall instead of incall and probably have to give a deposit, but at least you'll have someone to have fun with.