Over 115 miles long and 23 miles wide at its widest point, Green Bay is the second largest bay on Lake Michigan-Huron and one of the largest freshwater estuaries in the world, draining thousands of lakes, rivers, and wetland areas. Unlike Lake Michigan-Huron (which is over 900ft deep), Green Bay is relatively shallow (no more than 160ft deep---with an average of far less). This often means that Green Bay is much warmer than Lake Michigan-Huron in the summer and freezes over more quickly in the winter. It also makes the freshwater estuary one of the most productive on earth---not only for fish, but for birds which use the bay as a critical stopover site during their annual migrations.
Prized by fishermen for its walleye, perch, northern pike, and giant bass, Green Bay also lays claim to being home of the largest population of rare lake sturgeon in the world!