About Harmony Hall
The 18th century Harmony Hall mansion is located on a 62.5-acre open pasture land estate along the Potomac River. This estate was purchased by the National Park Service in 1966, to preserve southern Maryland cultural heritage. Surrounded by a rich landscape, it offers visitors many chances to connect with Colonial History. The park also home to the remains of the Want Water House and canal.
Plan a Visit
Core visitor information on this page is sourced from the National Park Service. NPD proximity sections use NPS reference coordinates and straight-line distance. Local source bundle updated Sep 27, 2026. View the official NPS page.
Weather & Conditions
Summers are generally hot and humid, with daytime highs frequently above 90 degrees Fahrenheit and scattered afternoon thunderstorms. Winters are generally cold, with nighttime lows frequently near freezing and occasional snowfall. Weather during spring and fall is generally moderate, but can change quickly..
NPS Reference Location
Park state / territory membership: Maryland. This map uses the National Park Service reference coordinate. It may represent an administrative or reference point rather than a park entrance, trailhead, visitor center, or the nearest access point. Use the official NPS directions below when planning travel.
Operating Hours
Park grounds are open daily from 6:00 a.m. to 10:00 p.m. There is no vehicle access or on-site parking. Historic structures are closed, and no facilities or amenities are available. Please do not attempt to enter any structures.
Activities
Getting There
From the Capital Beltway (I495/95) take Exit 3 to MD 210 South/Indian Head Highway, travel approximately 4 miles to Fort Washington Road, turn right. At the traffic light, Livingston Road, turn right. The Harmony Hall Regional Center will be on your left. That is where you will need to park. After parking, when facing Livingston Road, go to your left and the park entrance is the next driveway.
View Official DirectionsContact & Address
The NPS-listed address may be an administrative office, visitor center, mailing/contact location, or other park facility rather than a park entrance.
Topics & Themes
Things To Do
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Nearby National Park Service Sites
These sites are ordered by straight-line distance between NPS reference coordinates. This is useful for comparison, but it is not road mileage. Trails, parkways, rivers, and distributed units may extend far from their reference point.
