The river rises as a stream on Gunsight Mountain in Glacier National Park and flows into Gunsight Lake, then flows into St. Mary Lake, exits the park and flows on into Lower St. Mary Lake in the Blackfeet Indian Reservation. From the reservation, the St. Mary River flows into Alberta and into the St. Mary Reservoir. It flows into the Bow River which eventually reaches the Saskatchewan River.
It passes near the cities of Cardston, Alberta and Lethbridge, Alberta.
See also Saint Mary's River for other similarly named rivers.
StMarysRiver (Ont) connects Lake SUPERIOR to Lake HURON and forms part of the US/Canada border.
The obvious strategic value of the river was well known to the native people before Étienne BRÛLÉ travelled the river in 1622.
The Jesuit mission of Sainte Marie du Sault was founded on the river in 1668 but was abandoned in 1698 because of the IROQUOIS WARS, as was the first of 2 French fur-trade posts, which was established in 1689.
The St. Mary'sRiver Watershed was identified as warranting further investigation during a 1997 US Army Corps of Engineer (Corps) reconnaissance study of the Lower Potomac River.
This study found that, over the next 20 years, the St. Mary'sRiver watershed was likely to experience a rapid increase in population and that this population growth would be concentrated in the upper portions of the watershed.
Mary's County occupies a peninsula of land in southern Maryland along the western shore of the Chesapeake Bay between the Potomac and Patuxent Rivers.
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