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Rock Creek

Maryland/Washington Tributary

Rock Creek is a 36-mile tributary of the Potomac that starts in upper Montgomery County, Maryland, and flows south to the boundary of Maryland and D.C. The creek rises from a culvert under Dorsey Road at the north edge of Laytonsville Golf Course in Montgomery County, Maryland. A dam forms a small lake near its source. After exiting the golf course, Rock Creek flows between residential developments until it meets Agricultural History Farm Park, where the Upper Rock Creek Trail starts. It flows underneath the Intercounty Connector, which crosses it on a large arch bridge visible from the trail.

It then flows into Lake Needwood at Rock Creek Regional Park in Maryland's Derwood?Rockville area. South of the Lake Needwood Dam, Rock Creek flows in a deep gorge and is paralleled by the main Rock Creek Trail, and is joined by the North Branch Rock Creek. It exits the gorge near the Twinbrook neighborhood of Rockville and the Parklawn Memorial Cemetery.

At North Kensington, Beach Drive begins to parallel the creek. The creek eventually crosses the Capital Beltway and later reaches the Washington, D.C., border.

The creek flows for about 9 miles (14 km) through Rock Creek Park in Washington, where it is fed by several small creeks (Piney Branch, Pinehurst Branch, Broad Branch, Soapstone Branch, and Luzon Branch) and numerous storm sewers.

The Chesapeake and Ohio Canal joins Rock Creek in Georgetown; the creek's mouth is the canal's eastern terminus. Just below this confluence, the Canal Company in 1831 completed a mole, causeway, and waste weir. This area, which the company dubbed "Rock Creek Basin", silted up and was dredged several times for the Canal's use. The creek (and the canal) empty into the Potomac River at the Tidewater Lock near the Watergate complex. The Rock Creek Conservancy promotes a healthy creek. (Source: Wikipedia)

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Contact Information
Friends of Rock Creek's Environment
P.O. Box 42680
Washington DC 20015
202-237-8866
Website