Nowhere better than in the history of its railroads is the growth of the Old West revealed, and for Colorado the development of the Denver and Rio Grande Western epitomizes the changes that took place between 1870 and the present. Robert G. Athearn's intimate knowledge of the West has enabled him to write a gripping account of the famous narrow-gauge Denver and Rio Grande as it inched its way south, then turned west into the Rockies. By f1883 it had joined with the Rio Grande Western to become Colorado's only line across the mountains. The Dotsero Cutoff and the six-mile Moffat Tunnel put Denver on a transcontinental line for the first time. Twelve maps and fifty-five illustrations help tell the story.