Elk Ridge (Maryland)

Yarrowsburg is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 133 as of the 2010 census.

The Kennedy Farm is a National Historic Landmark property on Chestnut Grove Road in rural southern Washington County, Maryland. It is notable as the place where the radical abolitionist John Brown planned and began his raid on Harpers Ferry, Virginia (today West Virginia), in 1859. Also known as the John Brown Raid Headquarters and Kennedy Farmhouse, the log, stone, and brick building has been restored to its appearance at the time of the raid. The farm is now owned by a preservation nonprofit.

Brownsville (also Banjotown) is an unincorporated community and census-designated place in Washington County, Maryland, United States, near Gapland in an area known as Pleasant Valley. Its population was 89 as of the 2010 census.

Samples Manor is an unincorporated community in Washington County, Maryland, United States. The Kennedy Farm was listed on the National Register of Historic Places in 1973.

Garretts Mill is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 234 as of the 2010 census.

Gapland is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 109 as of the 2010 census.

The Robert Clagett Farm is a historic home and farm located at Knoxville, Washington County, Maryland, United States. The house is a one-story sandstone structure measuring three bays long by two bays deep in the Georgian-style. The house features a two-story galleried porch and an interior stone chimney. The farm also includes a small 1875 stone-arched bridge, a mid-19th century dairy barn, a small shed-roofed frame outbuilding which may once have housed pigs, and a 1930s frame garage.The Robert Clagett Farm was listed on the National Register of Historic Places in 1999.

Magnolia Plantation, also known as the Boteler-Holder Farm, is a historic house and former slave plantation located at Knoxville, Washington County, Maryland, United States. It is a 2-story, five-bay-wide house built about 1835, with a 1+1⁄2-story three-bay rear addition, set on finely coursed local fieldstone foundations. Also on the property are several modern outbuildings and a barn, and nearby is a private cemetery with a number of grave markers bearing the name Boteler.The Magnolia Plantation was listed on the National Register of Historic Places in 1975.

Dargan is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 165 as of the 2010 census.

Trego-Rohrersville Station is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 160 as of the 2020 census.

Gathland State Park is a public recreation area and historic preserve located on South Mountain near Burkittsville, Maryland, in the United States. The state park occupies the former estate of war correspondent George Alfred Townsend (1841-1914), who wrote under the pen name "Gath" during the American Civil War. The estate's few remaining original structures include the War Correspondents Memorial Arch, which sits alongside the Appalachian Trail. The park is operated by the Maryland Department of Natural Resources. The arch is a National Historic Monument maintained by the National Park Service.

Crampton's Gap, also known as Crampton Gap, is a wind gap on South Mountain in Maryland. The 928 feet (283 m) gap connects Burkittsville in the Middletown Valley to the east with Gapland and Rohrersville in the Pleasant Valley to the west. Documentation of the earliest land tracts in the Crampton's Gap area and records related to the earliest road may be found in The Land Tracts of the Battlefield of South Mountain by Curtis L. Older.The gap is the location of Gathland State Park and was the site of the Battle of Crampton's Gap on September 14, 1862, during the Maryland Campaign of the American Civil War.