Day 5 - Sleeping Bear Sand Dunes
Directions from Ludington to Sleeping
Bear Dunes National Lakeshore - Empire, MI
Take US-31 North out of Ludington
US-31 North meets with M-22
Follow M-22 North to Empire, MI
Follow signs to Sleeping Bear Dunes
National Lakeshore
Estimated travel time - 2.5 hours
Directions from Empire to Traverse
City
Follow M-22 to the Sleeping Bear
Park Headquarters
Turn East on M-72
Follow M-72 into Traverse City
Estimated travel time - 20 minutes
Schedule of events
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and Ludington. |
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Why visit Sleeping
Bear Dunes National Lakeshore?
According
to Chippewa Indian legend . . .
"Long ago,
in a land that today is Wisconsin, a mother bear and her two cubs were
driven
into Lake
Michigan by a raging forest fire. They swam and swam, but soon the
cubs tired and
lagged far
behind. Mother bear finally reached the opposite shore and climbed
to
the top of
a bluff to watch and wait for her offspring. But the cubs drowned.
Today "Sleeping
Bear," a solitary dune in Michigan, marks the spot where mother bear
waited.
Her hapless cubs are the Manitou Islands."
Aerial photo of Sleeping Bear Dunes National Lakeshore
courtesy of the National Park Service.
The Sleeping Bear Dunes National Lakeshore
is yet another place in Michigan where we can see
evidence of the amazing power of ice,
wind, and water. This area is extremely dynamic and unlike most
places geologic changes can be seen
within a human lifetime. Landslides have sent tons of sand
plunging into Lake Michigan twice
in the last hundred years, while trees are constantly disappearing
underneath the sand. Ghost
forests are left behind when sands migrate, bury trees, and then
continue moving. These forests
of dead trees are a constant reminder of the movement of these dunes.
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The glaciers from the Ice Age left
a sandy coast along the eastern shores of Lake Michigan, and just
like the dunes at Hoffmaster, Silver
Lake and Ludington, the winds from the west built up what we know as
Sleeping Bear Dunes. Two
types of dunes occur at Sleeping Bear, beach or coastal dunes and perched
dunes.
Beach dunes develop in low areas close
to the shore of Lake Michigan and are made of beach sand.
Perched dunes sit on plateaus
high above the shoreline and are made of glacial deposits left in those
areas. The Sleeping Bear Dune
spoken of in the Chippewa legend is a perched dune.
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Vegetation is as important at Sleeping
Bear as it was at the other dunes we visited. Beech grasses and
sand cherry are some of the first
plants to inhabit a newly formed dune. Roots anchor the sand and
the upper
part of the plants act as obstruction
which slows the movement of sand by wind. If vegetation is not
able to hold, a strong wind can cause
a blowout like the one in the picture below.
Unlike Silver Lake, vehicles are not
allowed on the dunes since they are a major factor in the
destruction of dune vegetation
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The Dune Climb from the bottom |
A blowout |
The Great Lakes
influence temperature and precipitation and therefore the climate of Michigan.
The ability of the Lakes to
absorb and hold heat makes the climate moderate when compared to areas
at
similar latitudes. The moisture
content in the air is high as it soaks up water from the lakes.
Summers are cooler along the shore
than they are inland, and winters are more moderate near the shore.
Lake Michigan heats up very slowly
throughout the spring and summer months and retains that
heat through the fall and winter when
it slowly begins to cool. Average temperatures along the Lake
Michigan coast range from 70 degrees
F in summer to 22 degrees F in winter. Precipitation averages
can be more than 40 inches along the
shore. Michigan is considered to be in a humid continental climate
with warm summers and no particular
dry season. This is classified as Dfb on the Koppen-Geiger system.
All four season are well pronounced.
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