South Mountain (Maryland and Pennsylvania)

Highfield-Cascade is a census-designated place (CDP) in Washington County, Maryland, United States. The CDP is, however, more commonly referred to as just Cascade, MD. The official CDP name encompasses two closely-spaced unincorporated communities, Highfield and Cascade. The population of the CDP was 1,141 at the 2000 census.

Camp Louise is an all-girls, Jewish overnight summer camp in the Catoctin Mountains in Cascade, Maryland. It is the sister camp of Camp Airy for boys, which is located in Thurmont. Girls between the ages of 7 and 17 attend for one to seven weeks, depending on their age and interest. Louise is a member of the American Camp Association.

Pen Mar is an unincorporated community in Washington County, Maryland, and Franklin County, Pennsylvania, United States. It is one of the border towns in the United States with a portmanteau name. Pen Mar came to prominence as a resort in the 20th century after the construction of Pen Mar Park by the Western Maryland Railway. While the resort has long been dismantled, the area still has some significance in Maryland, since it is the northern starting point for the Maryland section of the Appalachian Trail.

Pen Mar is an unincorporated community and census-designated place (CDP) that is located in Washington Township, Franklin County, Pennsylvania, United States. It is situated on the Mason–Dixon line, bordered to the south by the community of Pen Mar Park in Maryland.

Fort Ritchie in Cascade, Maryland was a military installation southwest of Blue Ridge Summit, Pennsylvania and southeast of Waynesboro in the area of South Mountain. Following the 1995 Base Realignment and Closure Commission, it closed in 1998.

Fort Ritchie is a census-designated place (CDP) in Washington County, Maryland, United States, just south of the Pennsylvania state line. The population was 276 at the 2000 census. Fort Ritchie is a former U.S. military base that closed in September 1998, pursuant to the 1995 Base Realignment and Closure Commission. Blue Ridge Summit, Pennsylvania is immediately to the north.

Pen Mar Park is a scenic area in Pen Mar, Washington County, Maryland. It is located on Pen Mar High Rock Road adjacent to the Mason–Dixon line.

Tipahato is a former summer residence in Cascade, Frederick County, Maryland that combines Italianate and bungalow design features, as well as Queen Anne and Colonial Revival design. This very large house was built in 1906.Tipahato was listed on the National Register of Historic Places in 2001.

Blue Ridge Summit is an unincorporated community and census-designated place 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 (5 km) east of Pen Mar, Maryland. The population of Blue Ridge Summit was 887 at the 2020 census.The community was the birthplace of Wallis Simpson, the wife of Prince Edward, Duke of Windsor (previously King Edward VIII of the United Kingdom). It is also home to one of the 15 oldest golf courses in the United States. Built before 1885, the Monterey Country Club has served as a summer retreat for many Washingtonians, and American presidents Woodrow Wilson, Calvin Coolidge and Dwight D. Eisenhower all played the Monterey Country Club course.

Monterey Pass is a 1,300 feet (0.40 km) mountain pass located in Franklin County, southern Pennsylvania.

The Monterey Country Club, which was built before 1885, is home to one of the oldest golf courses in the United States. The club sits just below the peaks of 1,720 Mt. Dunlap and 1,365 Monterey Peak in Blue Ridge Summit, Pennsylvania and is less than one mile (1.6 km) from the Mason–Dixon line and about 8 miles (13 km) away from Camp David.

Monterey, Pennsylvania, is an unincorporated community which was added to the USGS Geographic Names Information System on August 2, 1979. After the site was surveyed c. 1839 for the never-completed Tapeworm Railroad, the summit community was settled on the Emmitsburg & Waynesboro Turnpike [2] east of the Nichol's Gap Road intersection near the Toll Gate and Brown's Spring and later bypassed by the 20th century Pennsylvania Route 16 highway. As with the Pen Mar Park to the south, Monterey was the site of numerous resort facilities such as the Clermont House, 1887 Monterey Hotel,[3] the Monterey House,[4] the Monterey Inn, the Monterey Academy,[5] and the Monterey Country Club. The community's post office established in the late 19th century was named Charmian (another PA post office already was named Monterey),: 7  and the Charmian station of the Baltimore and Harrisburg Railway was established after the Western Extension was laid in 1888–1889 (cf. Monterey Station in 1872).