The Potawatomi Islands in February as the ice is breaking up. The edge of the Garden Peninsula to the north is on the left, and the edge of the Door Peninsula to the south is on the right.
The Potawatomi Islands is the most common historic name given to the string of islands that delineate the transition from Green Bay to Lake Michigan, one of the Great Lakes. The archipelago is also termed the "Grand Traverse Islands".
In the 19th century, a fishing industry was centered around the Potowatomi Islands. Areas where fishing was most active were termed fishing grounds, and were termed the Sack Bay, Summer Island, St. Martin Island, and Washington Island grounds. During the peak of the industry in the 1840s and 1850s, approximately 20 fishing families lived year-round on Summer Island and several more on Rock Island. Following the introduction of the steam tug in 1869 and also as the whitefish industry declined, most fishermen left the smaller islands. Those who continued to fish moved especially to Washington Island and harbors in Big and Little Bay de Noc. Switching from the sail-powered sloop to the steam tug expanded the fishermens' ranges and allowed them to live further from the fish they caught.[4]
^Islands of America, Bureau of Outdoor Recreation, United States Department of the Interior, 1970, page 31
^The Green Bay Watershed: Past/Present/Future by Gerard Bertrand, Jean Lang, and John Ross, Technical Report #229, University of Wisconsin Sea Grant College Program January 1976, section 6.1 "Early History" page 134
