We are Now Open For

New Guided Walking Tours & Day Passes

For These Historic Times

Guided Walking Tours

Available Thursdays ~ Sundays, 10am – 3pm

Tours on the Hour, Last Tour at 2pm.

One Group per Tour

Walking Tour Admission:

$10 adults, $8 students/seniors. Members & children under 5 Free.


Your will receive e-confirmation good for admission.

Or Call 410-275-8819 for day of tour availability.

Walk-ins Welcome on Space Available Basis.

For best availability book online!




Mount Harmon Day Passes

Available Daily 9am ~ 5pm

Day Pass Admission: (guided tour not included)

$10 adults, $8 students/seniors. Members free, children under 5 Free.


You will receive e-confirmation good for admission.

Day Passes also available at Visitor Center on Tour Dates (see above)


New this season, visitors can enjoy Mount Harmon’s history and natural beauty in two fun new ways, purposely designed with social distancing and safety in mind for our visitors: Guided Walking Tours & Day Passes.

Our new Mount Harmon Guided Walking Tours are purposefully designed to be primarily outside and when inside, in our most historic, yet larger rooms, to facilitate social distancing. The Walking Tour features a scenic walking tour of historic Mount Harmon Plantation, with guided tours of our Carriage House Education & Discovery Center, Manor House (first floor), Boxwood Garden, and Plantation Outbuildings: colonial kitchen, smoke house, and replica slave quarters. One group per tour, so is safe and great for families and small groups (maximum 6 per group).

Our new Walking Tour showcases more of Mount Harmon’s historic living history campus and exhibits than ever before, with scenic vistas at every turn. Benches at tour stops, with scenic overlooks. Walking Tour visitors are welcome to enjoy our grounds, gardens, picnic areas, and nature trails after your tour. Golf cart shuttle or parking at manor house available by reservation.

Our new Mount Harmon Day Pass (tour not included) is a wonderful option for nature and history lovers for enjoying our beautiful gardens, grounds, and 200-acre nature preserve with over 5 miles of nature trails, picnic areas, and canoe and kayak launch ~ great for hiking, picnicking, and exploring our scenic and historic site and waterfront.

Many thanks for following our leave no trace and social distancing guidelines, and for respecting other visitors on site by social distancing. Masks required inside buildings, where social distancing is not possible.

We hope this gives you more reasons than ever to come out and enjoy Mount Harmon! So visit often, and bring friends and family to enjoy our new Mount Harmon Walking Tour and Day Passes.

We look forward to seeing you at Mount Harmon!

More about our new Mount Harmon Walking Tour:

Your Guided Walking Tour begins at Mount Harmon’s charming Carriage House Education & Discovery Center for check in, orientation, and to see our Mount Harmon Highlights in History Exhibit (parking, restrooms, and gift shop also here). Stop 1

Your Walking Tour continues along to see a great view of our Serpentine-walled Boxwood Garden from the upper terrace, followed by guided tour of the Manor House (first floor). Stop 2

Your Walking Tour continues with a guided tour of Mount Harmon’s plantation outbuildings, each with a unique purpose and history, to learn more about the stories behind our colonial kitchen, smoke house, and slave quarters. These outbuildings are part of our recently expanded living history campus, and tell the fuller history of Mount Harmon. Stop 3

The Walking Tour loop is a short scenic walk (1/2 mile loop) with benches available at each stop. Golf cart shuttle or parking at manor house (by reservation or request).

Visitor Information: Arrive 15 – 30 minutes prior to tour time to check in and see visitor center exhibits. Walk-Ins Welcome on Space Available Basis.

Gardens, Grounds, Picnic Areas, & Nature Trails available after tour to enjoy.

Visitor Center, Manor House, and Outbuildings close at 3pm. The Gardens, Grounds, and Pool House facilities remain open until 5pm.

Proceed down our 1.8 mile scenic lane. Follow signs to visitor parking and check in. We look forward to seeing you!

Planning Your Visit

Entrance RoadArriving by land: Mount Harmon’s scenic two-mile entrance lane has welcomed visitors by land for over two and a half centuries. The picturesque entrance lane transports visitors back in time to a bygone era and is lined with gracefully cascading Osage Orange trees. Proceed 1.8 miles to end of entrance lane. Follow signs for visitor parking.

Arriving by water: Come to Mount Harmon by boat, as colonial-era visitors to Mount Harmon did in the 18th century. Mount Harmon is proud to welcome registered visitors and members via our new dock, located to the right and up the shore from the Prize House.  The dock has a 30 ft T-head and floating dock.  Dock coordinates are 39.22.44 N.  75.56.17 W.  Head left from dock and follow arrows and mowed trail to manor house.  All visitors by boat must register at Visitor Center or have confirmed Day Pass or be FOMH Members.

We suggest you plan to allow at least one hour for the tour, and additional time to explore the gardens, grounds, nature trails, and waterfront. Registered visitors and members are welcome to bring a picnic to enjoy on our grounds and scenic picnic areas. Recommendations for area restaurants to visit before or after your tour by emailing

Points of Interest

Manor House

Mount Harmon is a brick Georgian manor house that dates to 1730 and is listed on the National Register of Historic Places. The manor house has been restored to the 1760 – 1810 period, and is furnished with American, English, Irish and Scottish antiques, to reflect Mount Harmon’s owners of that period who actively traded with the British Isles. The Chinese Chippendale staircase and elegant furnishings reflect the refinement of plantation culture in early America. Mount Harmon was restored to its colonial era appearance when it was a prosperous tobacco plantation, and was restored by Marguerite du Pont Boden, a direct descendent of the colonial owners. Mount Harmon was part of the colonial revival movement in the 20th century and part of the legacy of the du Pont family to preserve America’s architectural heritage.

Formal Boxwood Garden

The formal boxwood garden enclosed by serpentine brick walls is a Thomas Jefferson design and evokes Mount Harmon’s golden age. Between the boxwood garden and the manor house are a pair of magnificent English Yew trees (Taxus baccata, variety dovastonii). These 200-year-old yews are among the oldest in the United States. The boxwood garden is a popular site for weddings, and overlooks McGill Creek.

Plantation Kitchen

The plantation kitchen is an original building and recalls domestic life and work on a colonial American plantation. It stands apart from the manor house and was restored and furnished with authentic kitchen artifacts of the colonial era. The plantation or colonial kitchen features open hearth where meals were prepared for the plantation owners. Hearth cooking programs are featured here for special events and school field trips.

Smoke House

The smoke house was on Mount Harmon’s colonial inventory, though like many clapboard buildings did not stand the test of time, and was recreated as part of our expanded living history campus to bring to life the working plantation outbuildings, each with a unique purpose and history. Prior to electricity and refrigeration, smoke houses were fixtures on plantations and used to smoke, cure, and store meats.

Slave Quarters

The replica slave quarters depicts the simple and sparsely furnished dwellings that housed the enslaved and indentured laborers who lived and worked at Mount Harmon, to bring to life their stories and history that enabled Mount Harmon to prosper.

Tobacco Barn

The replica tobacco barn depicts the colonial barns used to cure and store the cash crop tobacco.  Tobacco was widely popularized during the colonial era and became so valuable it was used as currency, to pay taxes, and in global trade. The tall and steep roof pitch was purposely designed to maximize the amount of tobacco that could be cured, in turn increasing profits for the plantation owners.

Prize House

Prize HouseMount Harmon was a local center for tobacco shipment for the Sassafras area and official port in colonial times. It boasts the northernmost existing tobacco prize house. “Prize” refers to the huge wooden screw used to compress tobacco from two casks into one, to double capacity and profits.

Discovery CenterEducation & Discovery Center

Housed in the renovated plantation stables, the Education & Discovery Center features a Mount Harmon Highlights in History Exhibit, expanded educational programs, and is available for special and community events. Mount Harmon’s gift shop is located here and full of unique gift items for all ages.

Nature Trails

A network of more than 5 miles of nature trails provides easy access to the plantation’s pristine natural surroundings – a historic Tidewater landscape, little changed by time. The trails allow visitors to explore the plantation’s scenic and historic waterfront, rare tobacco prize house, and diverse ecosystems full of wildlife.


Wildlife is abundant at Mount Harmon. The entire plantation is a nature preserve, and all forms of plants and animals on the property are protected. Visitors are requested not to pick the flowers or otherwise disturb plants and animals.

EagleRare and Endangered Species

Several rare and formerly endangered species live at Mount Harmon. A pair of American bald eagles nests in the vicinity and can be seen hunting over the plantation. The American Lotus (Nelumbo lutea), a relative of the water lily and the largest wildflower in the United States, is rare in Maryland and neighboring states but abundant at Mount Harmon with its peak flowering in August.