Click on the image for the full size.
Its description reads: "Map in full color with drawings of interesting features in the United States. Below the main map is an elevation profile with lines leading up to the point along the route noted below. The profile delineates the states, mileage and the height of the features on the profile. The route of the airplane is shown in blue and includes an airplane making the trip. Surround the map and profile are drawings of natural features and cities throughout the United States."
The map also shows that "Mason Menefee made the trip starting April 25, 1930, from Los Angeles to St. Louis."
Sorry if you're a map lover and that website just claimed your day...