Au Sable Light

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).

Au Sable Light
Au Sable Light complex in June 2021
LocationPictured Rocks National Lakeshore on Lake Superior
Coordinates46°40′23″N 86°08′21.6″W
Tower
Constructed1874
FoundationWood pilings
ConstructionBrick, Italianate bracketing
Automated1958
Height87 feet (27 m)
ShapeFrustum of a cone
MarkingsWhite with black lantern
HeritageNational Register of Historic Places listed place, Michigan state historic site 
Light
First lit1874
Focal height107 feet (33 m)
LensThird-order Fresnel lens (original), 12-inch (300 mm) acrylic (current)
Range11 nautical miles (20 km; 13 mi)
CharacteristicFlashing white every 6 s
Au Sable Light Station
U.S. National Register of Historic Places
Michigan State Historic Site
Nearest cityGrand Marais, Michigan
Area5 acres (2.0 ha)
ArchitectCol. Orlando M. Poe
Architectural styleItalianate bracketing
NRHP reference No.78000374
Significant dates
Added to NRHPMay 23, 1978
Designated MSHSSeptember 21, 1976
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