This 1914 booklet appears to be a direct ancestor of the escorted tours booklets that Union Pacific started publishing in the 1920s. This one does not include escorted tours but does list a few hotels and rates. More than half of the 68-page booklet, however, is devoted to photos of the region.
The booklet also contains a helpful list of provisions that a party of eight would need to camp for six weeks, including 4 bricks of cheese, 2 gallons of maple syrup, 25 pounds of bacon, and 25 pounds of dried apricots. Also on the list are 10 pounds of butter, three small hams, and a 3 pound pail of lard.
The front cover photo and one interior photo are attributed to “Wiswall Denver.” The Wiswall brothers–Wilbur Wellington and Harry Bruce–owned a photo shop in Denver, and at some point moved their business to Grand Lake, on the west side of Rocky Mountain National Park. Wilbur (1877-1941) was also a musician and he performed and gave music lessons while Bruce (who is sometimes called Henry Bruce and Bruce Harry but who evidently went by Bruce) ran a tavern in Grand Lake that was next door to the photo shop. Both took photos, though most known photos are attributed to Bruce.