At Project Gutenberg. This was put out by The Denver & Rio Grande Railroad to attract riders. Many scenes of Colorado Rocky Mountains, most of which show trains and tracks. Enjoy!
[FONT="]Around the Circle: One Thousand Miles Through the Rocky Mountains[/FONT]
https://www.gutenberg.org/ebooks/67539
[FONT="]Around the Circle: One Thousand Miles Through the Rocky Mountains[/FONT]
https://www.gutenberg.org/ebooks/67539