The Yellowstone Highway Association painted rocks yellow with a large Black “H” to mark the route of the highway.

The display is at the Wyoming Pioneer Memorial Museum in Douglas.

Yellowstone Highway bridge across Boxelder Creek between Douglas and Glenrock.

Yellowstone Highway in Wyoming and Colorado, 1916

The 1933 map of Glenrock by historian L. C. Bishop shows the importance of the North Platte River as a transportation corridor. The Oregon Trail, Chicago & Northwestern Railroad, and the Yellowstone Highway all followed the south side of the river.

The sign on the Morsch and Sons Garage in Douglas reads “GOOD ROADS CLUB   200 MEMBERS.” Good road clubs and civic organizations pushed for the formation of the Yellowstone Highway Association.