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 Airport Ste. Marie airport has frequent medevac, business aviation, and charter operations. It is a frequent stopping point for private pilots. Sault Ste. Marie Airport is home to the Ministry of Natural Resources Fire Management Centre and Flight Training Centre. The 622-square-metre facility is the first of its kind in Ontario. It is equipped with one of the most advanced flight training devices available, which simulates the sights, sounds and motions of the CL-415 water bomber aircraft used to fight forest fires in Ontario. Sault Ste. Marie Airport Sault Ste. Marie Airport, , is an international airport located west-southwest of the