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Pictured Rocks National LakeshorePicnic table waits patiently for visitors near the mouth of the Hurricane River on Lake Superior within Pictured Rocks National Lakeshore.
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Pictured Rocks National Lakeshore
Environmental Factors
This far-away photo of Miners Beach was taken from the trail to Miners Castle, through snow-covered trees.
Lars Jensen photo
Miners Beach through the trees
The lakeshore is located approximately 46 degrees north latitude and 86 degrees west longitude. The coldest months average well below 0°C (32°F) and the warmer months about 22°C (70°F).

Lake Superior greatly ameliorates temperature extremes, slowing spring warming and the onset of winter. The average date of the last freezing temperature in spring is June 8, and the average first fall freeze is September 23; however, freezing can occur during any month. The freeze-free period, or growing season, averages 107 days annually.

The big lake's presence also increases precipitation in the lakeshore. Annual precipitation averages 79 cm (31 inches); annual snowfall is 320 cm (126 inches). Snow generally covers the ground from late November through late April.

The area is within the second-most cloudy region of the United States, characterized by an annual mean cloud cover of 70 percent. Much of the cloudiness occurs in autumn and winter and can be attributed to cool air flowing over Lake Superior being warmed along the shore and forming clouds. This condition also often results in rain, fog, and snow. Spring is relatively clear due to the cold water surface of the lake.

The prevailing wind is from the west, with average velocities ranging from 12 to 15 kilometers per hour (7 to 9 mph). High winds and storm conditions on Lake Superior are not uncommon. The highest recorded one-minute wind speed is 98 kilometers per hour (59 mph).

 
The North Country National Scenic Trail stretches from North Dakota to New York, a distance of 3,200 miles.  

Did You Know?
The North Country National Scenic Trail connects outstanding scenic, natural, and cultural sites in seven northern states from Crown Point, New York, to Lake Sakakawea in North Dakota. The trail was established on March 5, 1980. Pictured Rocks National Lakeshore is home to 42 miles of the NCNST.
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Last Updated: February 24, 2009 at 15:30 EST