Like the California and Zion booklets, this one has a dozen color images. Unlike those other booklets, these appear to be actual color photos rather than hand-colored black-and-white photos. Modern Kodachrome wasn’t introduced until four years after this 1931 booklet came out, so it may simply be that the coloring artists who did these photos did a better job, or the photographers may have used a more primitive version of color film.
I believe the image on the cover is of Longs Peak in Rocky Mountain Park. Although UP published a separate book for Rocky Mountain National Park, at least 11 pages of this one is about that park and the Estes Park region. The booklet also covers Mesa Verde and the Colorado Springs area, including Pikes Peak and Garden of the Gods. Once owned by Charles Perkins, president of the Chicago, Burlington & Quincy Railroad, Garden of the Gods was given to the city of Colorado Springs on the condition that it always be free to the public.
Curiously, a photo on page 23 is taken from the same spot as the photo on page 2 of the Burlington booklet on Rocky Mountain Park, and the photo on page 9 is also similar to the one on page 14 of the Burlington booklet. Like the Burlington booklet, this one lists room rates for resort hotels in Estes Park as well as other places throughout Colorado.