Grand Sable Dunes temporary closure to all public entry for visitor safety
Grand Sable Dunes are rapidly eroding into Sable Creek and Lake Superior. The area from the Ghost Forest Trail north to Lake Superior then along the shoreline to the west side of Sable Creek is temporarily closed. Follow closure signs for your safety. More »
The most accessible sources of groundwater over a large part of Alger County are the deposits of glacial drift. These range from clayey till and lake deposits of low permeability to highly permeable sand and gravel outwashes. The most extensive outwash in Pictured Rocks National Lakeshore is the Kingston Outwash Plains. The thickness of the outwash deposits of the Kingston Plains probably exceeds 30 m (100 feet). Some small wells in the area are yielding in the range of 20 gallons per minute (gpm).
Did You Know?
Bear claw marks can be seen on the trunks of American beech trees because the bark is so smooth. Bears climb trees for safety and to eat beech nuts. The non-native beech bark disease is sweeping through Pictured Rocks National Lakeshore, killing many beech trees. Trees scarred with bear claw marks will be harder to find. More...