• The tower of the Au Sable Light Station against a summer blue sky. Photo © Craig Blacklock

    Pictured Rocks

    National Lakeshore Michigan

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  • Winter road closures

    While the calendar may say it is spring, Mother Nature says it is still winter in the central Upper Peninsula. Most roads remain closed by snow. More »

Air Quality

This aerial view of Spray Falls and the Pictured Rocks cliffs was taken from a small airplane. 

Spray Falls

NPS photo by Karen Gustin

Pictured Rocks National Lakeshore is designated a Class II area under the Clean Air Act. An assessment based on lichen flora and elemental analysis suggested that air quality in the vicinity is quite good.

Although large-scale heavy industry is quite distant from the national lakeshore, some long range/global atmospheric transport of pollutants to this area has been documented. Acid deposition in the central Upper Peninsula is a well-established phenomenon. Long-range transport of toxics/pollutants has apparently influenced other remote park units in the region more than Pictured Rocks National Lakeshore.

No baseline information exists on any ambient air quality parameter within the park boundary. There is an ozone monitoring station at Marquette, Michigan, 75 km (45 miles) to the west.

Did You Know?

The light tower and flagpole of the Au Sable Light Station stand proudly.

Located within Pictured Rocks National Lakeshore, the Au Sable Light Station is on the National Register of Historic Places. Constructed in 1874, the station beacon still shines over Lake Superior's frigid waters. The lamp is now solar powered. More...