No single track on the map yet, but if you ask in the office, they do have a map that shows a good portion of the single that you can look at, but they don't have any coppies yet. As for the submarine races, they have never been allowed, the lake has always been marked as "keep out" on the map, and there are also signs poisted around the lake to stay out of the water.
The map I have is old, and doesn't have all the single track on it now, plus it has lots of trails that go outside the park boundries, so I can't give out or post that map because people would be trying to follow all the trails on it. I am working on an updated map with all the single track on it, i don't have much time to work on it now, but I will have all the trails on a map before next spring, as well as having all the single track clearly marked.