I found this map in 'Duke vs. Duke' from season 3. Bo is showing Daisy which route he'll use in the race on Luke's map. In the episode the map appears upside-down, so the first thing I did was rotate it. It didn't take long to realise that the map looked familiar. It looks like a copy of the same map used in 'Double Dukes', but with different hand written names (you can see that map a few posts back where I identified Redding, CA. as the real Colonial City). On the right is what looks like 'Drexel County', which is a new one to me. Other names that are readable are Shelby Road, Chalk Hill, Partridge? Farm, (unclear) Indian Caves, (unclear) Gulch and (unclear) Practice Area. Maybe someone with better eyes than me can identify some more. Here's the real map of where California meets Oregon and Nevada. You can see it for yourself on Google Maps. In the top map Bo's finger would be about halfway between the two 139s at the bottom of this map.