Question: The longest national park unit in the eastern United States spans more than 2,100 miles. Can you name it?

Answer: The Appalachian National Scenic Trail runs from Mount Katahdin in ME to Springer Mountain in GA, traversing 14 states.

How well do you know your national and state parks? Darren Smith, About's guide to U.S./Canadian Parks, has put together five different quizes about the parks. Test your knowledge, Play Park Trivia.