Rock Creek is a waterway the flows towards the Potomac River. It drains into the Atlantic Ocean through Chesapeake Bay. The entire cove is said to be 32.6 miles in length with drainage section of approximately 76 miles. The creek ascends from a spring close to Laytonsville, Montgomery and converges at the Potomac next to Watergate and Georgetown in DC. Chesapeake and Ohio Canal connects with Rock Creek.
The Maryland section of the bay composes the second-biggest watershed