Au Sable Light
Au Sable Light complex in June 2021 | |
| Location | Pictured Rocks National Lakeshore on Lake Superior |
|---|---|
| Coordinates | 46°40′23″N 86°08′21.6″W / 46.67306°N 86.139333°W |
| Tower | |
| Constructed | 1874 |
| Foundation | Wood pilings |
| Construction | Brick, Italianate bracketing |
| Automated | 1958 |
| Height | 87 feet (27 m) |
| Shape | Frustum of a cone |
| Markings | White with black lantern |
| Heritage | National Register of Historic Places listed place, Michigan state historic site |
| Light | |
| First lit | 1874 |
| Focal height | 107 feet (33 m) |
| Lens | Third-order Fresnel lens (original), 12-inch (300 mm) acrylic (current) |
| Range | 11 nautical miles (20 km; 13 mi) |
| Characteristic | Flashing white every 6 s |
Au Sable Light Station | |
| Nearest city | Grand Marais, Michigan |
| Area | 5 acres (2.0 ha) |
| Architect | Col. Orlando M. Poe |
| Architectural style | Italianate bracketing |
| NRHP reference No. | 78000374 |
| Significant dates | |
| Added to NRHP | May 23, 1978 |
| Designated MSHS | September 21, 1976 |
Au Sable Light is an active lighthouse in the Pictured Rocks National Lakeshore west of Grand Marais, Michigan off H-58. Until 1910, this aid to navigation was called "Big Sable Light" (not to be confused with Big Sable Point Light near Ludington, Michigan on Lake Michigan or Little Sable Point Light south of Pentwater, Michigan).