Miller Run Natural Area
| Miller Run Natural Area | |
|---|---|
| Location | Lycoming County, Pennsylvania |
| Nearest town | Haneyville |
| Coordinates | 41°22′15″N 77°29′21″W / 41.3709°N 77.4891°W |
| Area | 4,992 acres (2,020 ha) |
Miller Run Natural Area is a 4,992-acre (2,020 ha) protected area in Lycoming County, Pennsylvania, United States. It is part of Tiadaghton State Forest, and is the second-largest designated Natural Area in Pennsylvania.