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 The local Rotary International club organizes a three-day event called Rotaryfest. Sault Ste. Marie was the focus of Kalle Mattson's "A Love Song to the City", whose music video premiered on USA Today. Sault Ste. Marie, Ontario Sault Ste. Marie ( "Soo Saint Marie") is a city on the St. Marys River in Ontario, Canada, close to the US–Canada border. It is the seat of the Algoma District and the third largest city in Northern Ontario, after Sudbury and Thunder Bay. To the south, across the river, is the United States and the city of Sault Ste. Marie, Michigan. These