| distance | reference number | name | latitude | longitude |
| 18.7 | 1825 | Middle Branch, Patapsco River, Baltimore Harbor, Ma | 39.2667 | -76.6333 |
| 20.2 | 273 | Bladensburg, Anacostia River, Maryland | 38.9333 | -76.9383 |
| 21.7 | 969 | Fells Point, Baltimore Harbor, Maryland | 39.2833 | -76.5833 |
| 22.0 | 137 | Baltimore (Fort McHenry), Maryland | 39.2667 | -76.5783 |
| 22.2 | 233 | Benning Bridge, Anacostia River, Washington, D.C. | 38.9 | -76.9667 |
| 22.6 | 503 | Chain Bridge, Washington, D.C. | 38.9333 | -77.1167 |
| 23.1 | 502 | Chain Bridge, one mile below, Washington, D.C. | 38.9167 | -77.1 |
| 23.3 | 1495 | Key Bridge, Washington, D.C. | 38.9 | -77.0667 |
| 24.2 | 3268 | Washington, Potomac River, D.C. | 38.8733 | -77.0217 |
| 24.4 | 59 | Anacostia Bridge, Anacostia River, Washington, D.C. | 38.8667 | -77 |
| 25.0 | 1251 | Hawkins Point, Patapsco River, Maryland | 39.2083 | -76.5333 |
| 25.7 | 2509 | Reagan National Airport, Washington, D.C. | 38.85 | -77.0333 |
| 25.8 | 494 | Cedar Point, Severn River, Virginia | 39.0667 | -76.5667 |
| 25.9 | 1019 | Fort Carroll, Patapsco River, Maryland | 39.2167 | -76.5167 |
| 26.7 | 222 | Bellevue, Washington, D.C. | 38.8333 | -77.0333 |
| 28.5 | 335 | Brewer Point, Severn River, Maryland | 39.0333 | -76.5333 |
| 28.7 | 35 | Alexandria, Virginia | 38.8 | -77.0333 |
| 29.9 | 1106 | Gingerville Creek, Maryland | 38.9667 | -76.55 |
| 30.0 | 2042 | North Point, Patapsco River, Maryland | 39.2 | -76.45 |
| 30.5 | 880 | Edgewater, South River, Maryland | 38.95 | -76.55 |
| 31.3 | 1271 | Hills Bridge (Route 4), Maryland | 38.8 | -76.7167 |
| 32.5 | 2743 | Sevenfoot Knoll Light, Maryland | 39.15 | -76.4167 |
| 32.7 | 2574 | Rocky Point, Back River, Maryland | 39.25 | -76.4 |
| 32.8 | 75 | Annapolis (US Naval Academy), Severn River, Marylan | 38.9833 | -76.48 |
| 32.8 | 3169 | U.S. Naval Academy, Annapolis, Maryland | 38.9833 | -76.48 |