St. Marys River (Michigan–Ontario) St. Marys River (Michigan–Ontario) The St. Marys River (), sometimes written as the St. Mary's River, drains Lake Superior, starting at the end of Whitefish Bay and flowing southeast into Lake Huron, with a fall of . For its entire length it is an international border, separating Michigan in the United States from Ontario, Canada. The twin cities of Sault Ste. Marie, Ontario, and Sault Ste. Marie, Michigan are connected across the St. Marys River by the Sault Ste. Marie International Bridge. The St. Marys Rapids are just below the river's exit from Lake Superior and can be bypassed by
Sault Ste. Marie, Ontario of about 900 people in Sault Ste. Marie between the corporate office and OLG Casino Sault Ste. Marie. The prize centre used to be administered in the city but was moved back to Toronto (York Mills) in 2009. The OLG is still the fourth largest employer, after Algoma Steel, Sault Area Hospital, and the call centre industry. Sault Ste. Marie is one of only a few cities in Ontario where a municipal bylaw prevents stores from opening on December 26, a Commonwealth holiday known as Boxing Day, and the day after Christmas. Retail stores in Sault Ste. Marie begin their