If you were a bicycling enthusiast back in 1896, you probably had this map on hand as you toured California. The map was surrounded by advertisements to make sure you had the latest bicycling gear. But more importantly the map outlined bike paths in red with labels which represented the road condition from good to very poor and the grade of the road from level to mountainous.
Check the map out on the Library of Congress site and download the high resolution image to see all the glorious detail!
Very cool!!