I overlayed a Google map of the region over that famous 1896 California cycling map from George Blum’s 80 page guide to cycle touring.
If I feel ambitious I might overlay a modern bike map – either Google’s bike layer, or the bike layer from OSM.
You can download the original image from the Library of Congress. Buy poster sized prints of this map from Zazzle. It would make a great gift, don’t you think?