Darnestown is a United States census-designated place (CDP) and an unincorporated area in Montgomery County, Maryland. The CDP is 17.70 square miles (45.8 km2) with the Potomac River as its southern border and the Muddy Branch as much of its eastern border. Seneca Creek borders portions of its north and west sides. The Travilah, North Potomac, and Germantown census-designated places are adjacent to it, as is the city of Gaithersburg. Land area for the CDP is 16.39 square miles (42.4 km2). As of the 2020 census, the Darnestown CDP had a population of 6,723, while the village of Darnestown is considerably smaller in size and population. Downtown Washington, D.C. is about 22 miles (35 km) to the southeast.
Darnestown, Maryland
Darnestown Presbyterian Church, constructed in 1858, as it appears in 2020
Black Rock Mill, constructed in 1815 and still standing in 2020
C&O Canal Lock 24 with Riley's Lockhouse in 2016
Seneca Creek (Potomac River tributary)
Seneca Creek is a 5.8-mile-long (9.3 km) stream in Montgomery County, Maryland, USA, roughly 16 miles (26 km) northwest of Washington, D.C. It drains into the Potomac River.
Seneca Creek and the Seneca Creek Greenway trail near Berryville Road in Darnestown, MD
The Aqueduct at Riley's Lock
The entrance to Seneca Creek Greenway trail at Seneca Rd in Darnestown, MD.
Built in 1837, the Seneca stone cutting mill cut the stone for the Smithsonian Castle
