I lived in Baltimore. As I said there are some beaches in the area, but "Baltimore Beach" is a volleyball court that isn't even on the water. From your link: "it’s not actually a real beach at all."
The Chesapeake Bay is not on the coast. For most of it you still need to go through a whole different state to get to the coast.
Coast to coast wasn't accurate but I was fine with the updated comment of "coast to almost coast."