POTOMAC
| Date | Clue |
|---|---|
| 2019-12-04 | View from behind the Lincoln Memorial |
| 2017-04-07 | Harpers Ferry river |
| 2014-11-27 | It meets the Shenandoah at Harper's Ferry |
| 2013-10-04 | Theodore Roosevelt Island setting |
| 2006-03-22 | Foggy Bottom's river |
| 1998-01-04 | River name meaning "where the goods are brought in" |
| 1995-09-27 | The Key Bridge spans it |