I got home a few weeks ago from South Florida. The west part that looks like it is on water on the map was a ferry ride. Not counting the ferry ride, about 380 miles (~ 610 km).
When they post a sign to tell you that you have climbed up to an elevation of 3 or 4 feet (1 to 1.3 meters) above sea level, that means you don't really need a lot of low gears.
Seven miles (11 km) is pretty long for a bridge, longest one I have ever been on.
The Sherpa worked great.