This is a map of the state highways in Washington as they existed in 1913. Primary routes are red, secondary routes are purple, and the portion of the old Cascade Wagon Road that remained is thinner purple. Thin orange is just current routes. Email me if you would like a copy of the GIS data I created for the highways.
No machine-readable source provided. Own work assumed (based on copyright claims).
No machine-readable author provided. NE2 assumed (based on copyright claims).