River

Reach

Length (miles)

Year Listed/ Updated

ORVs

Description

Rock Creek

Porter Street crossing to Maryland border.

5

1982

R, H

Recreation-(Segment is a part of a designated National Recreation Area, and one of the largest urban parks in the world, with high concentrations of urban populations in the Washington Metropolitan area.)

Historic-(Segment borders the National Zoological Park, a National Historic Register site planned by Frederick Law Olmstead and including a variety of significant 19th and 20th century buildings in a natural setting.)