Congress created the National Park Service the year this booklet was published, but the agency isn’t mentioned in the text, mainly because the U.S. Army continued to manage the park until 1918. This 16-page booklet describes two- to five-day tours into the park along with park services such as hotels, camps, and stage coaches.
The park has not much changed in the last century. The road network is about the same as it was in 1916, though the roads have been paved. A few hotels that existed in 1916 are gone today; a few others have been built. The main difference is the huge increase in the number of visitors, which has grown from under 52,000 in 1915 to more than 4 million in 2015. Since most of those visitors never see more than about 1 percent of the park, it could be said that they haven’t changed the park much either.