ISBN: | 978-5-5111-7645-1 |
High Quality Content by WIKIPEDIA articles! Rock Creek is a free-flowing tributary of the Potomac River, which empties into the Atlantic Ocean via the Chesapeake Bay. The creek is 32.6 miles (52.5 km) long, with a drainage area of about 76.5 square miles (198 km2). The last quarter-mile (402 m) of the creek is affected by tides.