When Mary Roberts Rinehart’s travelogue, Through Glacier Park, was first published in 1916, the already famous mystery writer introduced readers to recently minted national park and to the scenic wonders of Montana and to the adventures to be found there. Howard Eaton, an intrepid guide who had become known for his Yellowstone experience, had convinced Rinehart to make the trek to the West. Traveling three hundred miles on horseback with a group of more than forty assorted tourists of all shapes and sizes, she took in her fellow travelers, the scenery, and the travel itself with all the style and aplomb and humor of the talented fiction writer and journalist she was. Reprinted here with a foreword by, her grandson, publishing's Rick Rinehart, her words remain fresh and entertaining to this day.