Boundary Channel

Boundary Channel
Map of area surrounding Boundary Channel and the Pentagon Lagoon
Location
Country	United States
State	District of Columbia
Physical characteristics
Source	Potomac River
• coordinates	38°53′24.4″N 77°3′49.3″W / 38.890111°N 77.063694°W / 38.890111; -77.063694
• elevation	0 ft (0 m)
Mouth	Pentagon Lagoon
• coordinates	38°52′26″N 77°2′53″W / 38.87389°N 77.04806°W / 38.87389; -77.04806
• elevation	0 ft (0 m)
Basin features
River system	Potomac River

Boundary Channel is a channel off the Potomac River in Washington, D.C. The channel begins at the northwestern tip of Columbia Island extends southward between Columbia Island and the Virginia shoreline. It curves around the southern tip of Columbia Island before heading northeast to exit into the Potomac River. At the southwestern tip of Columbia Island, the Boundary Channel widens into the manmade Pentagon Lagoon.