Quirauk Mountain is the highest point on South Mountain

South Mountain (Maryland and Pennsylvania)

South Mountain is the northern extension of the Blue Ridge Mountain range in Maryland and Pennsylvania. From the Potomac River near Knoxville, Maryland in the south, to Dillsburg, Pennsylvania in the north, the long range separates the Hagerstown and Cumberland valleys from the Piedmont regions of...

. The 2145 feet (654 m) peak is located in northeastern Washington County

Washington County, Maryland

Washington County is a county located in the western part of the U.S. state of Maryland, bordering southern Pennsylvania to the north, northern Virginia to the south, and the Eastern Panhandle of West Virginia to the south and west. As of the 2010 Census, its population is 147,430...

, Maryland

Maryland

Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

. It lies just southwest of Fort Ritchie Military Reservation in the village of Cascade and about 1/2 mile southeast of the community of Blue Mountain. The Appalachian Trail

Appalachian Trail

The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the AT, is a marked hiking trail in the eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine. It is approximately long...

 and South Mountain State Park are about 1/2 mile to the west of the mountain's summit.

On the summit is a broadcast tower for radio stations WETH-FM and WAYZ-FM (in Hagerstown

Hagerstown, Maryland

Hagerstown is a city in northwestern Maryland, United States. It is the county seat of Washington County, and, by many definitions, the largest city in a region known as Western Maryland. The population of Hagerstown city proper at the 2010 census was 39,662, and the population of the...

) and "Site C", a radio communication outpost of the Alternate Joint Communications Center, a United States Department of Defense

United States Department of Defense

The United States Department of Defense is the U.S...

 emergency relocation site near Blue Ridge Summit, Pennsylvania

Blue Ridge Summit, Pennsylvania

Blue Ridge Summit is an unincorporated community in Franklin County, Pennsylvania, United States, southwest of Gettysburg in the central part of the state, adjoining Pennsylvania's southern border with Maryland. It is less than 3 miles east of Pen Mar, Maryland...

. There is a fenced-in area of the mountaintop that is federal property and thus a restricted area. Quirauk Mountain's broadcast tower was formerly used by radio stations WJEJ-FM and WWMD-FM. A fire lookout tower also used to occupy the summit.

About 1/2 mile to the west-southwest of the summit is High Rock (on the Appalachian Trail), which provides an excellent view of the surrounding countryside