The Laurentian Divide also called the Northern Divide and locally the '' height of land'', is a continental divide in central

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

that separates the

Hudson Bay Hudson Bay, sometimes called Hudson's Bay (usually historically), is a large body of Saline water, saltwater in northeastern Canada with a surface area of . It is located north of Ontario, west of Quebec, northeast of Manitoba, and southeast o ...

watershed to the north from the

Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...

watershed to the south and the

Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...

- St. Lawrence watershed to the southeast. Water north of the divide flows to Hudson Bay; water south of the divide and also south of the St. Lawrence Divide flows to the Gulf of Mexico, otherwise to the

Labrador Sea The Labrador Sea (; ) is an arm of the North Atlantic Ocean between the Labrador Peninsula and Greenland. The sea is flanked by continental shelf, continental shelves to the southwest, northwest, and northeast. It connects to the north with Baffi ...

or via the Great Lakes and St. Lawrence Seaway to the Gulf of St. Lawrence.

Background

From the divide's junction with the Continental Divide at Triple Divide Peak, just south of the U.S. border in northwestern

Montana Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, an ...

, it runs north to just across the border then east through southern Alberta and

Saskatchewan Saskatchewan is a Provinces and territories of Canada, province in Western Canada. It is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and to the south by the ...

where it turns southeasterly reentering the U.S. at the northwestern corner of

North Dakota North Dakota ( ) is a U.S. state in the Upper Midwest, named after the indigenous Dakota people, Dakota and Sioux peoples. It is bordered by the Canadian provinces of Saskatchewan and Manitoba to the north and by the U.S. states of Minneso ...

. It then continues to the extreme northeast corner of

South Dakota South Dakota (; Sioux language, Sioux: , ) is a U.S. state, state in the West North Central states, North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Dakota people, Dakota Sioux ...

before crossing the middle of

Minnesota Minnesota ( ) is a U.S. state, state in the Upper Midwestern region of the United States. It is bordered by the Canadian provinces of Manitoba and Ontario to the north and east and by the U.S. states of Wisconsin to the east, Iowa to the so ...

's western border at the Traverse Gap. The divide then runs north and east through northern Minnesota, through

Superior National Forest The Superior National Forest, part of the United States National Forest system, is located in the Arrowhead Region of the U.S. state, state of Minnesota between the Canada–United States border and the North Shore (Lake Superior), north shore o ...

in the eastern tip, into

Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...

. There it passes to the north of

Lake Nipigon Lake Nipigon ( ; ; ) is a freshwater lake in Northwestern Ontario. Part of the Great Lakes drainage basin, it drains through the Nipigon River into Lake Superior. It is the largest lake entirely within the Canadian province of Ontario. Ety ...

, then runs as far south as the 48th parallel before veering north again to cross the western border of

Quebec Quebec is Canada's List of Canadian provinces and territories by area, largest province by area. Located in Central Canada, the province shares borders with the provinces of Ontario to the west, Newfoundland and Labrador to the northeast, ...

just south of Lake Abitibi. It then meanders northeasterly across Quebec to the southwestern boundary of

Labrador Labrador () is a geographic and cultural region within the Canadian province of Newfoundland and Labrador. It is the primarily continental portion of the province and constitutes 71% of the province's area but is home to only 6% of its populatio ...

. From there, it follows the boundary jaggedly north to

Killiniq Island Killiniq Island (English: ''ice floes'') is a remote island in southeastern Nunavut and northern Newfoundland and Labrador, Canada. Located at the extreme northern tip of Labrador between Ungava Bay and the Labrador Sea, it is notable in that it ...

where it becomes the boundary between

Nunavut Nunavut is the largest and northernmost Provinces and territories of Canada#Territories, territory of Canada. It was separated officially from the Northwest Territories on April 1, 1999, via the ''Nunavut Act'' and the Nunavut Land Claims Agr ...

and Labrador before reaching its terminus at Cape Chidley on the

. Two triple divide points lie on the divide. One is at its origin on Triple Divide Peak, in Glacier National Park, Montana, where it meets the Continental Divide; this is usually considered the hydrological apex of North America. That peak divides the waters of the

Columbia River The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...

watershed which flow to the Pacific Ocean from the waters of the

Nelson River The Nelson River is a river of north-central North America, in the Provinces and territories of Canada, Canadian province of Manitoba. The river drains Lake Winnipeg and runs before it ends in Hudson Bay near Port Nelson, Manitoba, Port Nels ...

watershed which flow to Hudson Bay and the Mississippi River watershed which flows to the Gulf of Mexico. The other triple divide is at Hill of Three Waters near Hibbing,

, which is the junction with the St. Lawrence divide. This not a summit, but a highland plains where the watersheds of the Mississippi, Nelson and St. Lawrence River (which flows to the Gulf of St. Lawrence) meet. The eastern portion of the divide marked the original northern boundary of both Ontario and Quebec provinces at the time of

Confederation A confederation (also known as a confederacy or league) is a political union of sovereign states united for purposes of common action. Usually created by a treaty, confederations of states tend to be established for dealing with critical issu ...

in 1867, although both have since expanded significantly northward. West of Lake Superior, the divide formed the northern boundary of the United States'

Louisiana Purchase The Louisiana Purchase () was the acquisition of the Louisiana (New France), territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River#Watershed, Mississipp ...

in 1803.

Gallery

File:Edge of the Wilderness - Overlook on the Laurentian Divide - NARA - 7718220.jpg, Laurentian Divide along Highway 38 in Minnesota File:Hwy 101 Divide ON.jpg, Marker sign for the Divide along Highway 101 in Ontario File:Laurentian Divide, Burke County Hwy 40.jpg, Laurentian Divide along Highway 40 in Burke County, North Dakota

References

External links

* (Minnesota portion) {{Authority control Geography of North America Drainage divides Drainage basins of North America

Background

Gallery

See also

References

External links