Marriotts Ridge High School

Alpha is an unincorporated community in Howard County, Maryland, United States. A postal office operated from 27 February 1884 to 15 June 1915.Alpha is the site of the Mt. View Cemetery. The town between Marriottsville, and Sykesville is not recognized by the name, but is dominated by the controversial Alpha Ridge Landfill. It was home to one of Howard County's earliest bicycle clubs active in 1891.

Henryton Heights is an unincorporated community in Howard County, Maryland, United States.

Howard Lodge is a historic plantation house in north-central Howard County, Maryland. The main house, built around 1750 by Edward Dorsey, son of John Dorsey, is one of the oldest plantation houses in the county. Compared to other houses of the period, the two-story brick and stone structure is larger and its interior finishes better preserved. The surviving plantation property, about 15 acres (6.1 ha), also includes early 19th-century stone outbuildings. Edward Dorsey was given ownership of seven African-American slaves by his father John Dorsey.The property was listed on the National Register of Historic Places in 2012.

The Shipley House was located in Alpha, Howard County, Maryland, near Marriottsville. The house was among five other buildings supporting a farm in Alpha, Maryland. The 55-acre (22 ha) property was part of a 3,440-acre (1,390 ha) land grant named Woodford patented in 1727. John Taylor acquired the land and 2,707 acres (1,095 ha) of the estate were sold to Phillip Hammond in 1744. In 1777, Charles Hammond bequeathed 1,500 acres (610 ha) of Woodford and his slaves to his son. Nathan Shipley acquired a portion and through inheritance, Joshua H. Shipley acquired 77 acres (31 ha) of the Woodford estate, raising 12 children on-site. The slave plantation harvested tobacco and grain crops. The frame farm house was constructed in 1830. Outbuildings included a wellhouse (1900), a frame shed (1835), and a bank barn (1884). John and Mary O'Mara farmed and maintained the property as Sunnyside Farm, raising hoses and cattle until sale in 1979. The farm was purchased by Howard County in 1979 as possible expansion space for the controversial Alpha Ridge Landfill project. The county boarded up the properties without maintenance. In August 1992, the firm of Goodwin and Associates determined that the deterioration that occurred in twelve years of ownership by Howard County negated any effort to preserve the property. The land was converted to the Alpha Ridge Community Park in 1994, demolishing the Shipley House and outbuildings to replace them with a complex of revenue generating ball fields and facilities.

West Friendship is a semi-rural unincorporated community in western Howard County, Maryland, United States. West Friendship is located at the junction of Interstate 70 and Maryland Route 32. Frederick Road (Maryland Route 144) is a main thoroughfare.

Salopha or Solopha is a historic plantation house located in Sykesville, Howard County, Maryland.Salopha is a historic house, farm and bank barn. The farm house is built around a log house constructed in 1718 that predates the land grant patented to John Johnson in September 18, 1742. In 1762 Vachel Dorsey expanded the structure. The property was purchased in 1829 by Charles Alexander Warfield for $2,400 (~$74,723 in 2022). In 1889 the house was modified in a Gothic revival style. The home is the birthplace of former Carroll County commissioner Joshua Warfield Dorsey Sr. The bank barn built by the Warfield brothers in 1889 burned in 1972.

Henryton is an unincorporated community in Carroll County, Maryland, United States. It is located along the Patapsco River.

The Alpha Ridge Landfill (Alpha Ridge Sanitary Landfill) is a municipal solid waste landfill located in Marriottsville, Maryland, once known as the postal town of Alpha, Maryland. Alpha Ridge is the third official landfill built in Howard County, Maryland. Howard County's first landfill was New Cut in Ellicott City, Maryland which operated from 1944 to 1980 followed by Carr's Mill, operated between 1953 and 1977.

The Henryton Tunnel, located near Henryton in southern Carroll County, Maryland, is the third-oldest tunnel in the world that remains in active railroad use. Constructed by the Baltimore and Ohio (B&O) Railroad and opened around 1850, it was the first tunnel constructed on the B&O's Old Main Line. In 1865 the tunnel was widened to accommodate double track. It was rebuilt into its current form in 1903. The tunnel has brick portals and lining. The coping and footings are concrete.: 452 

The Maryland Sheep and Wool Festival an event featuring domestic sheep and wool. It is held at the Howard County Fairgrounds in West Friendship, Maryland.

Chapelgate Christian Academy (CCA) is a private Christian school located in Marriottsville, Maryland. It is affiliated with the Presbyterian Church of America.Chapelgate Christian Academy is a college preparatory school with a Christian worldview. To gain admittance to the school, a student's parent or guardian must agree with Chapelgate's statement of faith, foremost of which is the belief that the Bible is infallible and inerrant.Its high school athletic programs on the boys' side compete in the Maryland Interscholastic Athletic Association (MIAA), predominantly in the association's MIAA-C conference. Boys' basketball competes in the MIAA-B.

Henryton State Hospital is a now-demolished hospital complex in Marriottsville, in southern Carroll County, Maryland, just across the Howard County line. The complex was located within Patapsco Valley State Park and along its southern end runs CSX's Old Main Line Subdivision and is very close to the Henryton Tunnel. The Henryton State Hospital center, or the Henryton Tuberculosis Sanatorium as it was called, was erected in 1922 by the Maryland Board of Mental Hygiene. It was established as a facility to treat African Americans suffering from tuberculosis. This was one of the first such facilities in Maryland erected to provide African Americans with the same level of treatment as white people. Other accounts state that this was more of containment Hospital rather than a treatment facility. They contend that Henryton was used more for the exile and quarantine of tuberculosis patients. The original complex opened in 1922 and consisted of six main buildings and one utility plant. These buildings were erected between the years of 1921 and 1923. The establishment of the Henryton Sanatorium was one of the final steps in Maryland's program to treat all of the state's tubercular patients. In the late twenties and early thirties the tuberculosis rate among African Americans in Maryland was quadruple the rate among whites. This placed a heavy burden on the hospital to deal with the increasing number of patients. In 1938 the hospital was budgeted $270,000 for the construction of new buildings to house 200 more patients. A refrigerated morgue was demanded after the hospital cremated and disposed of the remains of an African American child before the parents were contacted. The new buildings roughly doubled the size of the overall facility, and several more municipal buildings added even more space to the complex. However, by the time the new buildings were completed in 1946, the tuberculosis rates had dropped, leaving much more room than was necessary.