Thunder Bay (Michigan)

Thunder Bay
Location	Alpena County, Michigan
Coordinates	45°00′00″N 83°24′00″W / 45.00000°N 83.40000°W / 45.00000; -83.40000Coordinates: 45°00′00″N 83°24′00″W / 45.00000°N 83.40000°W / 45.00000; -83.40000
Type	Bay
Surface elevation	581 feet (177 m)

Thunder Bay is a bay in the U.S. state of Michigan on Lake Huron. The bay extends from North Point at 45°01′19″N 83°15′58″W / 45.02194°N 83.26611°W / 45.02194; -83.26611 to South Point at 44°53′00″N 83°18′51″W / 44.88333°N 83.31417°W / 44.88333; -83.31417.

The city of Alpena lies at the mouth of the Thunder Bay River at 45°03′48″N 83°25′41″W / 45.06333°N 83.42806°W / 45.06333; -83.42806. The entire bay lies within Alpena County, with Alpena Township in the north and Sanborn Township in the south.

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