The Front Range runs north and south through Colorado and refers to where the plains on the east meet the foothills and then the mountains to the west.
It has the highest concentration of people, from about Ft Collins on the north, south to Boulder, down through the Denver metroplex, to Colorado Springs, to Pueblo.
I guess that’s why I liked the western part of Colorado better, but at my age I imagine health care facilities are less plentiful there, and maybe not the best places for the elderly.