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 is a multi-modal terminal designed to take advantage of the Sault as a rail, road, and water transportation hub. Sault Ste. Marie is also served by Sault Ste. Marie Airport and Sault Transit Services. The city is no longer connected by passenger rail to any other major cities, but is part of the Algoma Central Railway network, which runs north from the city to the small town of Hearst. In 2006 the city's Member of Parliament, Tony Martin, called for passenger rail service to be reinstated between Sault Ste. Marie and Sudbury. Area tourist attractions include the Canadian Bushplane Heritage