1934 “MAIN ROUTE TO MT. DIABLO” By bikedanville | December 29, 2020 Posted in History Danger Zone, Maps and tagged history, maps, state parks ← 1975 CA STATE PARKS REQUEST “COSTS RELATIVE TO THE MAINTENANCE”2011 “ROAD FLOODED” WHO CLEARED THE CULVERT? → About bikedanville View all posts by bikedanville →