Maryland
National Parks with Hiking
| Antietam National Battlefield |
| Dogs are allowed on the trails across the battlefield |
| Assateague Island National Seashore |
| Dogs are allowed on the beach but not on the trails |
| Catoctin Mountain Park |
| Dogs are allowed on the trails in this park |
| Chesapeake and Ohio Canal National Historic Park |
| Dogs are allowed on the trails in this park |
| Greenbelt Park |
| Dogs are allowed everywhere in this park |
| Monocacy National Battlefield |
| Dogs are allowed on the trails on the battlefield |