Au Sable Light is an active lighthouse in the Pictured Rocks National Lakeshore west of Grand Marais, Michigan off H-58.

The Au Sable Point reef is a shallow ridge of sandstone that in places is only 6 feet (1.8 m) below the surface and extends nearly 1 mile (1.6 km) into Lake Superior.

The Au Sable Point reef was one of the greatest dangers facing ships coasting along the south shore of Lake Superior during the early shipping days when keeping land in sight was the main navigational method.

Thick fogs resulted form the mix of frigid lake air and warmth from the sand dunes.

[11] The lighthouse tower and attached keepers' quarters were designed by Colonel Orlando Metcalfe Poe.

The complex was maintained by the National Park Service, and the automated light continues to be operated by the United States Coast Guard.

[4][7] [18] To visit this light, take H-58 from the Hurricane River Campground, which is 12 miles (19 km) west of Grand Marais, Michigan.