St. Marks Light
The St. Marks Light at an unknown date. | |
| Location | mouth of St. Marks River, on Apalachee Bay, St. Marks, Florida |
|---|---|
| Coordinates | 30°04′19″N 84°10′48″W / 30.07194°N 84.18000°W |
| Tower | |
| Constructed | 1831 |
| Foundation | stone |
| Construction | brick |
| Automated | 1960 |
| Height | originally 65 feet (20 m), extended to 73 feet (22 m) in 1867, light is 82 feet (25 m) above sea level |
| Shape | conical tower |
| Heritage | National Register of Historic Places listed place |
| Light | |
| First lit | first tower, 1831; second tower, 1842 |
| Focal height | 25 m (82 ft) |
| Lens | fourth order Fresnel lens, replaced by 9.8-inch (250 mm) lens |
| Range | 8 nmi (15 km; 9.2 mi) |
| Characteristic | white light occulting every 4 s. |
St. Marks Lighthouse | |
The lighthouse as it appeared in 2013 | |
| NRHP reference No. | 72000356 |
| Added to NRHP | July 31, 1972 |
The St. Marks Light is the second-oldest light station in Florida, United States. It is located on the east side of the mouth of the St. Marks River, on Apalachee Bay.