Great Duck Island Light
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 US Coast Guard photo | |
 | |
| Location | Great Duck Island, Maine |
|---|---|
| Coordinates | 44°8′31.129″N 68°14′44.947″W / 44.14198028°N 68.24581861°W |
| Tower | |
| Constructed | 1890  |
| Foundation | Timber and stone |
| Construction | Brick and granite |
| Automated | 1986 |
| Height | 13 m (43 ft) |
| Shape | Cylindrical |
| Markings | White with black lantern |
| Heritage | National Register of Historic Places listed place |
| Fog signal | HORN: 1 every 15s operates continuously |
| Light | |
| Focal height | 67 feet (20 m) |
| Lens | 5th order Fresnel lens (original), VRB-25 (current) |
| Range | 19 nautical miles (35 km; 22 mi) |
| Characteristic | Fl R 5s |
Great Duck Island Light Station | |
| Nearest city | Frenchboro, Maine |
| Area | 11 acres (4.5 ha) |
| Built | 1890 |
| Architect | US Army Corps of Engineers |
| MPS | Light Stations of Maine MPS |
| NRHP reference No. | 88000159[1] |
| Added to NRHP | March 14, 1988 |
Great Duck Island Light is a lighthouse on Great Duck Island in the town of Frenchboro, Maine, USA.[2][3][4] Established in 1890, the light marks the approach to Blue Hill Bay and the southern approaches to Mount Desert Island on the central coast of Maine. The light was listed on the National Register of Historic Places as Great Duck Island Light Station on March 14, 1988.[1] The light is an active aid to navigation maintained by the United States Coast Guard; the property is owned by the College of the Atlantic, which operates a research station there.
