Dexter Marsh

The Black River is a 125-mile-long (201 km) blackwater river that empties into the eastern end of Lake Ontario on the shore of Jefferson County, New York in the United States. The origin of the name is not clear, but it may stem from the natural tannic acid that darkens the water in places. The river flows in a generally northwest direction, with its valley dividing the Adirondack Mountains on the east from the Tug Hill region to the west.

Stevenson-Frink Farm is a historic farm complex located at Hounsfield in Jefferson County, New York. The farm complex consists of the stucco-covered concrete block farmhouse built in 1917–1918, its contemporary garage and four earlier contributing agriculture related outbuildings: a stone smokehouse, a former stable/carriage barn, a cattle barn, and granary. Also on the property is a contributing house site. It was listed on the National Register of Historic Places in 1989.

Jefferson County is a county on the northern border of the U.S. state of New York. As of the 2020 census, the population was 116,721. Its county seat is Watertown. The county is named after Thomas Jefferson, third President of the United States of America. It is adjacent to Lake Ontario, southeast from the Canada–US border of Ontario. The county is part of the North Country region of the state. Jefferson County comprises the Watertown-Fort Drum, NY Metropolitan Statistical Area. The popularity of the area as a summer tourist destination results in a dramatic increase of population during that season. In 2014, it elected Colleen M. O'Neill as the first woman county sheriff in the state. She had served with the New York State Police for 32 years. The United States Army's 10th Mountain Division is based at Fort Drum. The base had a total population of nearly 13,000 according to the 2010 census.

Hounsfield is a town in Jefferson County, New York, United States. The population was 3,466 at the 2010 census. The name of the town is from Ezra Hounsfield, a land agent and land owner. He once owned the Southern part of the township. The town was named by Augustus Sacket. Hounsfield is in the western part of the county and is west of Watertown.

Dr. Samuel Guthrie House is a historic home located at Hounsfield in Jefferson County, New York. The home comprises a rectangular two-story, five-by-two-bay, brick Federal style core building and a rectangular one-story rear wing. The rear wing is in three sections: a section constructed around 1822, an addition from the early 20th century, and a third from about 1910. It was listed on the National Register of Historic Places in 1989.

Shore Farm, historically known as "Shore Farm Camp," is a historic farm complex located at Hounsfield in Jefferson County, New York. The farm complex consists of the Luff/Wardwell House, a former tenant house/milk house, and a cattle barn. The house is a stone and wood-frame structure dating to about 1822 and enlarged about 1895. Also on the property are non-contributing cabins and cottages. It was listed on the National Register of Historic Places in 1989.

Watertown International Airport (IATA: ART, ICAO: KART, FAA LID: ART) is in the Town of Hounsfield in Jefferson County, New York, United States, 6 mi (5.2 nmi; 9.7 km) west of Watertown. The airport is used for general aviation, but has scheduled passenger service subsidized by the Essential Air Service program. The airport has no scheduled international passenger flights, but is available as an international port of entry for private aircraft on two hours' advance notice from pilots. The Federal Aviation Administration says this airport had 2,203 passenger boardings (enplanements) in calendar year 2010, 4,449 in 2011, and 16,988 in 2012. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2023–2027, in which it is categorized as a non-hub primary commercial service facility.

Stephen Simmons House is a historic home located at Hounsfield in Jefferson County, New York. The farmhouse was built about 1818 and consists of a 2+1⁄2-story main block and an original 1-story rear wing, with a modern 1-story wood-frame garage attached to the wing. The walls are of roughly dressed local ashlar limestone laid in even courses and trimmed with smoothly dressed limestone.It was listed on the National Register of Historic Places in 1989.

Madison Barracks was a military installation established in 1813 or 1815 at Sackets Harbor that was built for occupation by 600 U.S. troops, a few years after the War of 1812. It was named for James Madison who had just completed his presidency in 1817. Construction began under the name Fort Pike. The facility is a National Historic Landmark and a historic district located in Jefferson County, New York. The district includes 86 contributing buildings and two contributing structures. It includes the stone hospital, bakery, several warehouses known as "Stone Row," a stone water tower, and a series of brick buildings constructed in the 1890s as officers quarters, barracks, mess hall, and weapons storage and repair building. Madison Barracks was used as a Citizens' Military Training Camp between the world wars. Madison Barracks was the U.S. Army's primary post in upstate New York until Pine Camp (later renamed Fort Drum) was opened in 1908. Madison Barracks remained an active military installation through the end of World War II, to 1947. General Mark W. Clark, a senior commander during World War II, was born at Madison Barracks in 1896 while his father Charles Carr Clark was stationed there. The grounds and remaining buildings of Madison Barracks are now part of a combined residential and business development. The Madison Barracks site was listed on the National Register of Historic Places in 1974.

Trout Creek flows into the Black River near Dexter, New York.

Ressequie Farm is a historic farm complex located at Hounsfield in Jefferson County, New York. The farm complex consists of a 1+1⁄2-story gabled ell, L-shaped farmhouse built about 1840 in the Greek Revival style and five outbuildings. Contributing outbuildings are a cattle barn, granary, pig house, chicken coop, and former carriage house.It was listed on the National Register of Historic Places in 1989.

Sackets Harbor (earlier spelled Sacketts Harbor) is a village in Jefferson County, New York, United States, on Lake Ontario. As of the 2020 census, Sackets Harbor had a population of 1,351. The village was named after land developer and owner Augustus Sackett, who founded it in the early 1800s. Sackets Harbor is in the western part of the town of Hounsfield and is west of Watertown. The heart of the village, with a Main Street and well-preserved 19th century buildings, has been recognized as the Sackets Harbor Village Historic District and listed on the National Register of Historic Places in 1983. To support the War of 1812, the US Navy built a major shipyard and its headquarters for the Great Lakes at the village. Within a short period, more than 3,000 men worked at the shipyard. The Army constructed earthworks, forts, barracks and supporting infrastructure to defend the village and navy shipyard, and its troops also camped in the village. The thousands of military personnel made it seem like a city. By the fall of 1814, this was the third-largest population center in the entire state, after Albany and New York City. With its strategic protected harbor on Lake Ontario and military installations, the village had national importance through the 19th century. Soon after the war, the Army strengthened its defenses on the northern frontier by constructing Madison Barracks. The village also developed a commercial shipyard and many business connections to communities around the Great Lakes. Its businessmen were also connected to bases in the major markets of Louisville, Kentucky, and New Orleans. In 1817 a consortium of local businessmen supported construction of the 240-ton Ontario, the first US steamboat on the Great Lakes. In July 1834, the commercial schooner Illinois from Sackets Harbor was the first to enter the harbor of the new settlement of Chicago. Sackets Harbor Battlefield State Historic Site commemorates a battle during the War of 1812 and the contribution of the area to the United States defense.