| Greenbrier State Park | |
| Iucn Category: | III |
| Iucn Ref: | [1] |
| Map: | USA Maryland |
| Map Size: | 280 |
| Relief: | 1 |
| Location: | Frederick County & Washington County, Maryland, United States |
| Nearest Town: | Boonsboro, Maryland |
| Coordinates: | 39.5361°N -77.6236°W |
| Area Acre: | 1420 |
| Elevation: | 1027feet |
| Designation: | Maryland state park |
| Established: | 1963 |
| Website: | Greenbrier State Park |
Greenbrier State Park is a public recreation area located on South Mountain, 3miles northeast of Boonsboro in Washington County, Maryland, USA. The state park has camping, hiking trails, and a 42acres man-made lake. It is managed by the Maryland Department of Natural Resources.
Greenbrier and Janes Island State Park were created in 1963. Between 1964 and 1978, the Maryland General Assembly authorized funding of over $2 million for land acquisition and development of Greenbrier's camping and picnic areas, beach, day-use facilities, parking areas, interpretive center, roads, and trails.
The park offers camping, fishing, boat launch and rentals, swimming, hiking, picnicking, mountain biking and hunting. The park's visitor center is open year-round, its nature center seasonally.
In 1995, two rare albino deer were spotted in the park. In 2008, the park received a federal grant for $130,000 to build concrete culverts to allow box turtles to safely cross Keadle Road within the park. The pilot program was the first of its kind in the United States.