The Red River Valley is a region 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 is drained by the

Red River of the North The Red River (), also called the Red River of the North () to differentiate it from the Red River of the South, Red River in the south of the continent, is a river in the north-central United States and central Canada. Originating at the confl ...

; it is part of both Canada and the United States. Forming the border between

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 ...

and

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 ...

when these territories were admitted as states in the United States, this fertile valley has been important to the economies of these states and to

Manitoba Manitoba is a Provinces and territories of Canada, province of Canada at the Centre of Canada, longitudinal centre of the country. It is Canada's Population of Canada by province and territory, fifth-most populous province, with a population ...

, Canada. The population centers of

Moorhead, Minnesota Moorhead ( ) is a city in and the county seat of Clay County, Minnesota, Clay County, Minnesota, United States, on the banks of the Red River of the North. Located in the Red River Valley, an extremely fertile and active agricultural region, Moo ...

; Fargo and

Grand Forks, North Dakota Grand Forks is a city in and the county seat of Grand Forks County, North Dakota, United States. The city's population was 59,166 as of the 2020 United States census, 2020 census, making it the List of cities in North Dakota, third-most populous ...

; and

Winnipeg, Manitoba Winnipeg () is the capital and largest city of the Provinces and territories of Canada, Canadian province of Manitoba. It is centred on the confluence of the Red River of the North, Red and Assiniboine River, Assiniboine rivers. , Winnipeg h ...

, developed in the valley as settlement by ethnic Europeans increased in the late nineteenth century. Completion of major railroads, availability of cheap lands, and forceful removal of Indigenous people as well as a subsequent refusal to recognize Indigenous land claims attracted many new settlers. Some developed large-scale agricultural operations known as bonanza farms, which concentrated on wheat commodity crops. Paleogeographic

Lake Agassiz Lake Agassiz ( ) was a large proglacial lake that existed in central North America during the late Pleistocene, fed by meltwater from the retreating Laurentide Ice Sheet at the end of the last glacial period. At its peak, the lake's area wa ...

laid down the Red River Valley Silts. The river flows north through a wide ancient lake plain to

Lake Winnipeg Lake Winnipeg () is a very large, relatively shallow lake in North America, in the Canadian province of Manitoba. Its southern end is about north of the city of Winnipeg. Lake Winnipeg is Canada's sixth-largest freshwater lake and the third- ...

. The geography and seasonal conditions can produce devastating floods, with several recorded since the mid-20th century.

Indigenous population

The valley was long an area of habitation by various indigenous cultures, including the historic

Ojibwe The Ojibwe (; Ojibwe writing systems#Ojibwe syllabics, syll.: ᐅᒋᐺ; plural: ''Ojibweg'' ᐅᒋᐺᒃ) are an Anishinaabe people whose homeland (''Ojibwewaki'' ᐅᒋᐺᐘᑭ) covers much of the Great Lakes region and the Great Plains, n ...

and

Métis The Métis ( , , , ) are a mixed-race Indigenous people whose historical homelands include Canada's three Prairie Provinces extending into parts of Ontario, British Columbia, the Northwest Territories and the northwest United States. They ha ...

peoples. The Métis Nation, which originated largely in the Red River Valley and organized politically in the 19th century, radiating outwards from the Red River Settlement (now

Winnipeg Winnipeg () is the capital and largest city of the Provinces and territories of Canada, Canadian province of Manitoba. It is centred on the confluence of the Red River of the North, Red and Assiniboine River, Assiniboine rivers. , Winnipeg h ...

). Descendants of this community are known as the Red River Métis.

Early European settlement

French fur traders had relations with First Nations and Native Americans throughout the Great Lakes region. They often lived with the tribes and married or had relations with native women. By the mid-17th century, the

, descendants of these Frenchmen and

Cree The Cree, or nehinaw (, ), are a Indigenous peoples of the Americas, North American Indigenous people, numbering more than 350,000 in Canada, where they form one of the country's largest First Nations in Canada, First Nations. They live prim ...

tribes people (in addition to other First Nations peoples), settled in the Red River valley. The Métis established an

ethnicity An ethnicity or ethnic group is a group of people with shared attributes, which they Collective consciousness, collectively believe to have, and long-term endogamy. Ethnicities share attributes like language, culture, common sets of ancestry, ...

and culture, as many continued a tradition as hunters and traders involved in the fur trade. They were also farmers in this area. The British took over French territory east of the Mississippi River following its victory in the

Seven Years' War The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The protagonists were Kingdom of Great Britain, Great Britain and Kingdom of Prus ...

. In the early 19th century, the lucrative fur trade attracted continuing interest, and Lord Selkirk established the

Red River Colony The Red River Colony (or Selkirk Settlement), also known as Assiniboia, was a colonization project set up in 1811 by Thomas Douglas, 5th Earl of Selkirk, on of land in British North America. This land was granted to Douglas by the Hudson's Bay ...

. In 1803 the United States acquired former French territory west of the Mississippi River in the

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 ...

from France. This included some of the Red River Valley.

U.S. geographical importance

The U.S. government uses the term ''Red River Valley'' generally to describe the sections of northwestern Minnesota and eastern North Dakota to which it secured title following the Anglo-American Convention of 1818 that settled the northern boundary of the US and Canada. This land became part as the second article of the 1818 treaty declared the 49th parallel to be the official border between the U.S. and

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

up to the

Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in great-circle distance, straight-line distance from the northernmost part of Western Can ...

. (This borderline was extended to the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

in 1846 under the

Oregon Treaty The Oregon Treaty was a treaty between the United Kingdom and the United States that was signed on June 15, 1846, in Washington, D.C. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to ...

.) The land acquired under the treaty had an area of , comprising 1.3 percent of total U.S. land area. Centered on the

, these lands had previously been under the control of

Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...

. West of the Red River Valley, the territory of the

, which the US acquired from France, extends north of the 49th parallel. The US ceded this to Britain in exchange for gaining the Red River Valley. These northernmost parts of the Louisiana Purchase are one of the few North American territories ever ceded by the United States to a foreign power.

Prone to flooding

Four factors make the Red River Valley prone to flooding (the factors are related to physical geography): ''Synchrony of Discharge with Spring Thaw:'' The Red River flows northward. The spring thaw also proceeds gradually northward. As a result, runoff from the southern portion of the valley gradually joins the fresh melt-off waters from northerly areas along the Red River. In the northern part of the Valley, this can result in devastating floods if the effects occur at the same time. ''Ice Jams:'' These are also produced because of the northward-flowing river system. Ice is moving from the southern Valley and freshly-broken ice is moving from the central and northern Valley. These two meet steadily; as a result, ice concentration in this system builds and causes delay of water flow. ''Glacial Lake Plain:'' The floor of Glacial Lake Agassiz is one of the flattest expanses of land in the world. Here, the Red River has cut a shallow, winding valley. As a result of this, when the river floods on this plain, a devastating event can occur. The areal coverage of the waters can become dramatic. Being approximately 9,300 years old, the Red River has not yet carved a large valley-floodplain systems on the surrounding geography. Thus, the large lake plain becomes the floodplain to the Red River. The Lake Agassiz glacial lake plain extends around 100 miles from east to west, end to end, between northeastern North Dakota and northwestern Minnesota. ''Decrease in Gradient Downstream:'' The gradient, or slope, of the Red River averages 5 inches per mile of length. In the region of Drayton-Pembina, the gradient is only 1.5 inches per mile. The water tends to pool in this area during flood season. The region can become a massive, shallow lake.

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