Autos would soon replace horses and wagons. The National Park service invested in a fleet of autos for the purpose of giving tours. Today Glacier National Park has preserved and maintained these stile of vehicles for transporting visitors on the Highway to the Sun. (see more of these cars).
Teddy Roosevelt visited Yellowstone in April 24 1903 and dedicated The Roosevelt Arch, that is the entrance to the park from Gardner.
Editors Note: a month and a day later, May 25, Teddy Roosevelt visited Yakima WA just north of Toppenish, while campaigning for president. Yes, it was the Northern Pacific that brought him there.