The Fraser Lowland is a

landform A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, ...

and

physiographic region Physiographic regions of the world are a means of defining Earth's landforms into distinct regions, based upon the classic three-tiered approach by Nevin M. Fenneman in 1916, that separates landforms into physiographic divisions, physiographic pr ...

in the

Pacific Northwest The Pacific Northwest (sometimes Cascadia, or simply abbreviated as PNW) is a geographic region in western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though ...

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

, shared between the

Canadian province Within the geographical areas of Canada, the ten provinces and three territories are sub-national administrative divisions under the jurisdiction of the Canadian Constitution. In the 1867 Canadian Confederation, three provinces of British North ...

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

and the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...

Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...

. The region includes much of the

Lower Mainland The Lower Mainland is a geographic and cultural region of the mainland coast of British Columbia that generally comprises the regional districts of Metro Vancouver and Fraser Valley. Home to approximately 3.05million people as of the 2021 Canadia ...

region of British Columbia, and the

coastal plain A coastal plain is flat, low-lying land adjacent to a sea coast. A fall line commonly marks the border between a coastal plain and a piedmont area. Some of the largest coastal plains are in Alaska and the southeastern United States. The Gulf Coa ...

s of Washington's

Whatcom County Whatcom County is a county located in the northwestern corner of the U.S. state of Washington, bordered by the Canadian Lower Mainland (the Metro Vancouver and Fraser Valley Regional Districts of British Columbia) to the north, Okanogan Cou ...

. As a physiographic region, the Fraser Lowland is part of the

Georgia Depression The Georgia Depression is a depression in the Pacific Northwest region of western North America. The depression includes the lowland regions of southwestern British Columbia and northwestern Washington along the shores of the Salish Sea. Format ...

, which in turn is part of the Coastal Trough.''Landforms of British Columbia: A Physiographic Outline'', by S. Holland 1964 (revised 1976), British Columbia Ministry of Energy, Mines and Petroleum Resources
The eponymous

Fraser River The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain in the Rocky Mountains and flowing for , into the Strait of Georgia just south of the City of Vancouver. The river's annual d ...

in the Lowland's north and the lower basins of its

tributaries A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage b ...

(mainly the

Pitt River The Pitt River in British Columbia, Canada is a large tributary of the Fraser River, entering it a few miles upstream from New Westminster and about 25 km ESE of Downtown Vancouver. The river, which begins in the Garibaldi Ranges of the Coas ...

Coquitlam River The Coquitlam River ( /koʊˈkwɪtləm/ or /kəˈkwɪtləm/) is a tributary of the Fraser River in the Canadian province of British Columbia. The river's name comes from the word Kʷikʷəƛ̓əm which translates to "Red fish up the river". The na ...

and Vedder/

Chilliwack River Chilliwack ( )( hur, Ts'elxwéyeqw) is a city in the province of British Columbia, Canada. Chilliwack is surrounded by mountains and home to recreational areas such as Cultus Lake and Chilliwack Lake Provincial Parks. There are numerous outdoo ...

s), as well as the entire

catchment A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the ...

of the oppositely flowing

Sumas River The Sumas River is a river in the Fraser Lowland and a tributary of the Fraser River river system, system, coursing across the Canada–United States border, international border between the Provinces and territories of Canada, Canadian province o ...

, are the Lowland's primary

river system In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of land, whether a particular region is dominated by h ...

. However, the region also includes the lower

Nooksack River The Nooksack River is a river in western Whatcom County of the northwestern U.S. state of Washington, draining extensive valley systems within the North Cascades around Mount Shuksan, Mount Baker and the Twin Sisters, and a portion of Fraser Lo ...

basin ("Nooksack Lowland") south of the Canada–US border, which belongs to a completely separate river system arising from the southeast in the namesaked valleys around the

North Cascades The North Cascades are a section of the Cascade Range of western North America. They span the border between the Canadian province of British Columbia and the U.S. state of Washington and are officially named in the U.S. and Canada as the Cascad ...

Mount Shuksan Mount Shuksan is a glaciated massif in the North Cascades National Park. Shuksan rises in Whatcom County, Washington immediately to the east of Mount Baker, and south of the Canada–US border. The mountain's name ''Shuksan'' is derived from th ...

Baker A baker is a tradesperson who bakes and sometimes sells breads and other products made of flour by using an oven or other concentrated heat source. The place where a baker works is called a bakery. History Ancient history Since grains ha ...

and Twin Sisters. Overall, the Fraser Lowland encompasses all the fertile low-lying

fluvial plain A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudi ...

s between and around the Fraser and Nooksack rivers,Fraser Lowland Map
University of the Fraser Valley including the

Sumas Prairie Sumas Prairie is a landform in British Columbia, Canada and the State of Washington, United States. Part of the Fraser Lowland, it was created by the draining of Sumas Lake early in the 20th Century, and extends from the Vedder Canal southwestwar ...

, the

Burrard Peninsula The Burrard Peninsula ( squ, Ulksen) is a peninsula in the Lower Mainland region of British Columbia, Canada, bounded by the Burrard Inlet to the north, the Georgia Strait to the west, the North Arm of Fraser River to the south, and the Pitt Riv ...

, and sometimes also the North Shore lowlands around the

Burrard Inlet french: Baie Burrard , image = Burrard Inlet 201807.jpg , image_size = 250px , alt = , caption = Aerial view of Burrard Inlet , image_bathymetry = Burrard-Inlet-map-en.svg , alt_bathymetry ...

. The American

pene-exclave An enclave is a territory (or a small territory apart of a larger one) that is entirely surrounded by the territory of one other state or entity. Enclaves may also exist within territorial waters. ''Enclave'' is sometimes used improperly to deno ...

Point Roberts Point or points may refer to: Places * Point, Lewis, a peninsula in the Outer Hebrides, Scotland * Point, Texas, a city in Rains County, Texas, United States * Point, the NE tip and a ferry terminal of Lismore, Inner Hebrides, Scotland * Points ...

lies to the region's west, at the southern end of the Tsawwassen peninsula.

Geography

The Fraser Lowland is roughly triangular and about in total area. The

Strait of Georgia The Strait of Georgia (french: Détroit de Géorgie) or the Georgia Strait is an arm of the Salish Sea between Vancouver Island and the extreme southwestern mainland coast of British Columbia, Canada and the extreme northwestern mainland coast ...

coastline between

in the north and

Bellingham Bay Bellingham Bay is a bay of the Salish Sea located in Washington State in the United States. It is separated from the Strait of Georgia on the west by the Lummi Peninsula, Portage Island, and Lummi Island. It is bordered on the east by Bellingha ...

in the south marks its western/southwestern boundary, and the region extends east through the generally flat terrain between the

Coast Mountains The Coast Mountains (french: La chaîne Côtière) are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia ...

to the north and the

Vedder Mountain The Vedder Mountain is a branch of the Cascade Range in the Pacific Northwest, located at the southeastern edge of the Fraser Lowland in British Columbia, Canada, between the village of Yarrow and the village of Cultus Lake, extending from the Vedd ...

Cascade Range The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, ...

to the southeast, all the way to the easternmost end of the

Fraser Valley The Fraser Valley is a geographical region in southwestern British Columbia, Canada and northwestern Washington State. It starts just west of Hope in a narrow valley encompassing the Fraser River and ends at the Pacific Ocean stretching from the ...

near

Hope Hope is an optimistic state of mind that is based on an expectation of positive outcomes with respect to events and circumstances in one's life or the world at large. As a verb, its definitions include: "expect with confidence" and "to cherish ...

, where the

Coquihalla River The Coquihalla River (originally or more recently and popularly ) is a tributary of the Fraser River in the Cascade Mountains of the Canadian province of British Columbia. It originates in the Coquihalla Lakes and empties into the Fraser River ...

drains into the Fraser River at the latter's westward bends out of the

Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...

. The Canadian Sumas and the

Chilliwack Mountain Chilliwack Mountain is a small mountain rising from the floodplain of the Fraser River in the city of Chilliwack, British Columbia, Canada Canada is a country in North America. Its ten provinces and three territories extend from the A ...

stand out on the southbank of the Fraser River, in the middle of the eastern Fraser Lowland, demarcating the Fraser Valley into its "Upper" and "Lower" parts. The rich soil, plentiful

precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzle, rain, sleet, snow, ice pellets, graupel and hail. ...

, and mild marine climate make the entire region a prime agricultural land. Much has been cultivated for

farmland Agricultural land is typically land ''devoted to'' agriculture, the systematic and controlled use of other forms of lifeparticularly the rearing of livestock and production of cropsto produce food for humans. It is generally synonymous with bot ...

. The Fraser Lowland is politically divided by the Canada–United States border into two parts. Both the area and population are much larger on the Canadian side (Fraser Valley and Sumas Prairie) with about 2.4 million residents.Imagining the Future of Cross Border Environmental Resource Management within the Fraser Lowland
University of the Fraser Valley The main

population center Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world. Governments typically quantify the size of the resident population within their jurisdiction using a ...

Greater Vancouver Greater Vancouver, also known as Metro Vancouver, is the metropolitan area with its major urban centre being the city of Vancouver, British Columbia, Canada. The term "Greater Vancouver" is roughly coterminous with the geographic area governed b ...

at the northwestern end of the Fraser Lowland. Other population centers on the Canadian side include Abbotsford and

Chilliwack Chilliwack ( )( hur, Ts'elxwéyeqw) is a city in the province of British Columbia, Canada. Chilliwack is surrounded by mountains and home to recreational areas such as Cultus Lake and Chilliwack Lake Provincial Parks. There are numerous outdoor ...

, both part of the

Fraser Valley Regional District The Fraser Valley Regional District (FVRD) is a regional district in British Columbia, Canada. Its headquarters are in the city of Chilliwack. The FVRD covers an area of 13,361.74 km² (5,159 sq mi). It was created in 1995 by ...

. The population on the American side of the Lowland (the Nooksack Lowland and all the upper

basin south of

Sumas Sumas () is a city in Whatcom County, Washington, United States. It had a population of 1,307 as of the 2010 census. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia. The Sumas-Huntingd ...

) is about 200,000. It is dominated by the coastal city of Bellingham at the Lowland's southernmost tip.

References

Geography of the Pacific Northwest Geography of British Columbia Geography of Washington (state) Lower Mainland {{geology-stub

Geography

See also

References