San Mar Rd San Mar is located at 39.553391, -77.634033 geo coordinates. San Mar Rd, San Mar, MD 21713 is located in Maryland, San Mar, Mount Lena, Boonsboro, United States Of America. Postal code is: 21713
| Latitude | Longitude |
|---|---|
| 39.553391 | -77.634033 |
| DMS Latitude | DMS Longitude |
|---|---|
| 39° 33´ 12.2076'' N | 77° 38´ 2.5188'' W |