Ashmun Bay is a small bay that is a part of the Upper St. Mary's River. It receives water from Ashmun Creek, which drains much of the interior Sault Ste. Marie. It is surrounded by the city of Sault Ste. Marie, Michigan, with a city access ramp for small boats on the north shore. References Sault Ste. Marie, Michigan Bays of Michigan Bays of Lake Superior Bodies of water of Chippewa County, Michigan