the Potomac River
/ðə pəˌtəʊmæk ˈrɪvə(r)/
/ðə pəˌtəʊmək ˈrɪvər/
- a river in the eastern US. It begins in the Appalachian Mountains in West Virginia and flows 285 miles/459 kilometres past Harpers Ferry, Mount Vernon and Washington, DC, into Chesapeake Bay on the Atlantic coast.