| Name |
County |
| Antietam National Battlefield |
Washington County |
| Appalachian National Scenic Trail |
Berks |
| Assateague Island National Seashore |
Worcester |
| Catoctin Mountain Park |
Frederick County |
| Chesapeake and Ohio Canal National Historical Park |
Berkeley |
| Clara Barton National Historic Site |
Montgomery County |
| Fort McHenry National Monument and Historic Shrine |
Baltimore city |
| Fort Washington Park |
Prince George's County |
| George Washington Birthplace National Monument |
Westmoreland |
| George Washington Memorial Parkway |
Arlington |
| Greenbelt Park |
Prince George's County |
| Hampton National Historic Site |
Baltimore County |
| Harpers Ferry National Historical Park |
Jefferson |
| Harriet Tubman Underground Railroad National Historical Park |
Dorchester County |
| Monocacy National Battlefield |
Frederick County |
| National Capital Parks |
District of Columbia |
| Piscataway Park |
Prince George's County |
| Rock Creek Park |
District of Columbia |
| Thomas Stone National Historic Site |
Charles County |
