Is it safe to walk on Frozen Lake Michigan?

This can be dangerous as you might think you're walking on solid ground, when actually you're out over the water. Due to the layered nature of shelf ice, even if you're out over four feet of water, if you were to fall through a thin spot in the ice, you could find yourself trapped in an ice cavern.



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It seems incredibly dangerous to walk across a frozen lake as big as Lake Michigan in those conditions. According to the interwebs the distance would be about 59 miles, which would take several days in the elements.

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Nevertheless, the Great Lakes typically begin to freeze at the end of December heading into January. Their peak freeze occurs in late February and early March. The Great Lakes average an ice coverage of 55%, meaning that at least half of the lakes' surface areas are bound to freeze during the winter months.

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In water that is around the freezing point, a person is likely to survive only 15 to 45 minutes with flotation and possibly up to an hour or so with flotation and protective gear before the brain and heart stop (Table 1). The surface temperature of Lake Superior in early to mid-summer is about 40 to 50 F.

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Do not attempt to cross this ice. Watch for rivulets flowing on the ice or streams flowing under it. Even when the surface looks solid, a current under the ice causes erosion from below.

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Great Lakes that have completely frozen include Lake Superior, Lake Huron, Lake Erie, and Lake Ontario. Lake Michigan is the only Great Lake to have never frozen entirely.

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Lake Superior is the world's largest freshwater lake by area (31,700 mi2 /82,100 km2). It is also the coldest and deepest of the Great Lakes, with a maximum depth of 406 meters (1,332 feet). By most measures, it is the healthiest of all the Great Lakes.

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Lake Erie averages the highest ice cover Of the five Great Lakes, Lake Erie typically reaches the highest annual maximum ice cover, often exceeding 80 percent.

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According to the U.S. National Ice Center at NOAA, ice thickness ranges from two to six inches in most places. Thicker ice, of a foot or more, is forming in Little and Big Bays De Noc in Lake Michigan; Black and Nipigon Bays in Ontario, and Wisconsin's Chequamegon Bay in Lake Superior.

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Those who brave the frigid feat and swim in the winter are nicknamed “ice monsters.” Lake Michigan continuously cools throughout winter, and with March averaging an annual low of 32.9 degrees, it's the chilliest month for open-water swimming.

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If you can see the ground through the ice, then there's going to be warmer water under it. Out in the middle, the ice grows thicker over the cold dark depths. Also, ice always melts away from the shore first.

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