And Colorado has 54 mountains over 14,000 feet. :) Again, not many people live that high. The 'highest' real town is Leadville, at over 10,000 feet. Runners like to train there. You will find cabins and individual homes at higher elevations, of course.

I now in southern England, which is very much flat land. I like visiting Wales and Scotland and wandering in their foothills (er, mountains ;).