Rocky Gorge Reservoir, also known as T. Howard Duckett Reservoir, is located along the Patuxent River in Maryland. Rocky Gorge is one of two impoundments that are maintained as a drinking water source by the Washington Suburban Sanitary Commission (WSSC).

Its sister impoundment, Triadelphia Reservoir, is located several miles upstream.

Rocky Gorge Reservoir Fish Species

Rocky Gorge Reservoir contains largemouth bass, smallmouth bass, northern pike, chain pickerel, yellow perch, white perch, channel catfish, and other species.

Special regulations apply to Rocky Gorge Reservoir. For more information, visit the Washington Suburban Sanitary Commission website (

Related Information

Patuxent River

Triadelphia Reservoir

Maryland Freshwater Fishing