Green Bay, arm of Lake Michigan

Green Bay, western arm of Lake Michigan, c.100 mi (160 km) long and from 10 to 20 mi (16–32 km) wide, NE Wis. and NW Mich.; separated from the lake by the Door and Garden peninsulas. The Fox River flows into the head of the bay at Green Bay, Wis., a port city. A national and a state forest lie along a portion of the northern shore.

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