The Clearwater River is located in the

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

s of

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 ...

and

Alberta Alberta is a Provinces and territories of Canada, province in Canada. It is a part of Western Canada and is one of the three Canadian Prairies, prairie provinces. Alberta is bordered by British Columbia to its west, Saskatchewan to its east, t ...

. It rises in the northern forest region of north-western Saskatchewan and joins the

Athabasca River The Athabasca River (French: ''Rivière Athabasca'') in Alberta, Canada, originates at the Columbia Icefield in Jasper National Park and flows more than before emptying into Lake Athabasca. Much of the land along its banks is protected in nationa ...

in north-eastern Alberta. It was part of an important trade route during the

fur trade The fur trade is a worldwide industry dealing in the acquisition and sale of animal fur. Since the establishment of a world fur market in the early modern period, furs of boreal ecosystem, boreal, polar and cold temperate mammalian animals h ...

era and has been designated as a

Canadian Heritage River The Canadian Heritage Rivers System (CHRS; ) is a joint program administered by the federal, provincial, and territorial governments to conserve and protect the best examples of Canada's river heritage, to give them national recognition, and to e ...

Course

The Clearwater River has a total length of . It flows south-eastward from its

headwaters The headwater of a river or stream is the geographical point of its beginning, specifically where surface runoff water begins to accumulate into a flowing channel of water. A river or stream into which one or many tributary rivers or streams flo ...

at Broach Lake and turns to the south-west from

Careen Lake Careening (also known as "heaving down") is a method of gaining access to the hull of a sailing vessel without the use of a dry dock. It is used for cleaning or repairing the hull. Before ship's hulls were protected from marine growth by fastening ...

to the Alberta / Saskatchewan border. From there it flows westward for a distance of to join the

Fort McMurray Fort McMurray ( ) is an urban service area in the Regional Municipality of Wood Buffalo in Alberta, Canada. It is located in northeast Alberta, in the middle of the Athabasca oil sands, surrounded by boreal forest. It has played a significa ...

. The section of the river in Fort McMurray is referred to as ''the Chant''. From Broach Lake at an elevation of above sea level, the Clearwater drops about to the confluence at Fort McMurray. Its waters eventually reach the Arctic Ocean via the Athabasca and

Mackenzie River The Mackenzie River (French: ; Slavey language, Slavey: ' èh tʃʰò literally ''big river''; Inuvialuktun: ' uːkpɑk literally ''great river'') is a river in the Canadian Canadian boreal forest, boreal forest and tundra. It forms, ...

s. Tributaries of the Clearwater River include Descharme River and McLean River in Saskatchewan and the

Christina River The Christina River is a tributary of the Delaware River, approximately 35 miles (56 km) long, in northern Delaware. It also flows through small areas of southeastern Pennsylvania and northeastern Maryland. Near its mouth, the river ...

in Alberta.

Geology

In its upper reaches, the Clearwater River flows over the

Precambrian The Precambrian ( ; or pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of t ...

rocks of the

Canadian Shield The Canadian Shield ( ), also called the Laurentian Shield or the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), th ...

. That section of the river is rough, characterized by rapids, small waterfalls, and a gorge. The river leaves the Shield near the Alberta border and enters the

Interior Plains The Interior Plains is a vast physiographic region that spreads across the Laurentian craton of central North America, extending along the east flank of the Rocky Mountains from the Gulf Coast region to the Arctic Beaufort Sea. In Canada, it ...

where it becomes

meander A meander is one of a series of regular sinuous curves in the Channel (geography), channel of a river or other watercourse. It is produced as a watercourse erosion, erodes the sediments of an outer, concave bank (cut bank, cut bank or river cl ...

ing, with numerous sand bars and small islands. There it is flanked by

outcrop An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth and other terrestrial planets. Features Outcrops do not cover the majority of the Earth's land surface because in most p ...

s of the

Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...

limestone Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...

s, dolomite, and

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

s of the

La Loche La Loche () is a village in northwest Saskatchewan. It is located at the end of Highway 155 on the eastern shore of Lac La Loche in Canada's boreal forest. La Loche had a population of 2,827 in 2016 and is within the Northern Saskatchewan Adminis ...

, Contact Rapids, Keg River, and

Waterways Formation The Beaverhill Lake Group is a geologic unit of Middle Devonian to Late Devonian (late Givetian to Frasnian) age in the Western Canada Sedimentary Basin that is present in the southwestern Northwest Territories, northeastern British Columbia an ...

s, as well as the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

oil sands Oil sands are a type of unconventional petroleum deposit. They are either loose sands, or partially consolidated sandstone containing a naturally occurring mixture of sand, clay, and water, soaked with bitumen (a dense and extremely viscous ...

of the

McMurray Formation The McMurray Formation is a Stratigraphy, stratigraphic unit of Early Cretaceous Geochronology, age (late Barremian to Aptian stage) of the Western Canadian Sedimentary Basin, Western Canada Sedimentary Basin in northeastern Alberta. It takes the ...

. The Clearwater River is an

underfit stream A misfit stream is a river that is either too large or too small to have eroded the valley or cave passage in which it flows. This term is also used for a stream or river with meanders that obviously are not proportional in size to the meanders ...

; that is, its present flow is insufficient to have carved its broad, steep-sided valley. Instead, its morphology may be the result of catastrophic

paleoflooding The phenomenon of paleoflooding is apparent in the geologic record over various spatial and temporal scales. It often occurred on a large scale, and was the result of either glacial ice melt causing large outbursts of freshwater, or high sea levels ...

that originated from

Glacial 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 was ...

during late

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

time and flowed through the Clearwater and Athabasca river valleys on its way to the Arctic Ocean.Smith, D.G. and Fisher, T.G. 1993
Glacial Lake Agassiz: The northwestern outlet and paleoflood
Geology, vol. 21, p. 9-12. The channel cut by that flood is known as the Clearwater Spillway. There are several salt springs and saline marshes that discharge into the Clearwater River in northeastern Alberta. The water, which comes from the underlying

rock formations, is

effervescent Effervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from that release. The word effervescence is derived from the Latin verb ''fervere'' (to boil), preceded by the adverb ''ex''. It has the same l ...

in places and smells of

sulfur Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms ...

History

Rock-paintings along the upper portion of the river, shapes and symbols on rock surfaces, suggest that the area was already inhabited 5,000 years ago. Before the European colonisation, native groups of

Beaver Beavers (genus ''Castor'') are large, semiaquatic rodents of the Northern Hemisphere. There are two existing species: the North American beaver (''Castor canadensis'') and the Eurasian beaver (''C. fiber''). Beavers are the second-large ...

Chipewyan The Chipewyan ( , also called ''Denésoliné'' or ''Dënesųłı̨né'' or ''Dënë Sųłınë́'', meaning "the original/real people") are a Dene group of Indigenous Canadian people belonging to the Athabaskan language family, whose ancest ...

, 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 ...

people lived in the Clearwater River area. During European exploration and the

of the 18th century, the lower Clearwater River was part of an important canoe route between

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 ...

and

Montreal Montreal is the List of towns in Quebec, largest city in the Provinces and territories of Canada, province of Quebec, the List of the largest municipalities in Canada by population, second-largest in Canada, and the List of North American cit ...

in the east, and the

District of Athabasca The District of Athabasca was a regional administrative district of Canada's Northwest Territories. It was formed in 1882, was later enlarged, and then abolished with the creation of the provinces of Saskatchewan (its central-eastern part) and A ...

in the west. The rough Precambrian upper portion of the Clearwater River was a barrier to the traders until 1778, when explorer

Peter Pond Peter Pond (January 18, 1739 – 1807) was an American explorer, cartographer, merchant and soldier who was a founding member of the North West Company and the Beaver Club. Though he was born and died in Milford, Connecticut, most of his li ...

crossed the

Methye Portage The Methye Portage or Portage La Loche in northwestern Saskatchewan was one of the most important portages in the old North American fur trade, fur trade route across Canada. The portage connected the Mackenzie River basin to rivers that ran east ...

to bypass it. Methye Portage extended between

Lac La Loche Lac La Loche is a lake in north west Saskatchewan near the Alberta border. The lake is part of the Churchill River system that flows into the Hudson Bay. The La Loche River at the southern end flows into Peter Pond Lake which is connected ...

and the Clearwater River, forming a overland link on the route from

Churchill, Manitoba Churchill is a subarctic port town in northern Manitoba, Canada, on the west shore of Hudson Bay, roughly from the Manitoba–Nunavut border. It is most famous for the many polar bears that move toward the shore from inland in the autumn, leadi ...

Athabasca, Alberta Athabasca (2021 census (Canada), 2021 population 2,759), originally named Athabasca Landing, is a town in northern Alberta, Canada. It is located north of Edmonton at the intersection of Alberta Highway 2, Highway 2 and Alberta Highway 55, Hig ...

. For almost 40 years, this was the only overland connection for the fur trade in the region, and it continued in use for most of the 19th century.

Fish species

The river's fish species include:

walleye The walleye (''Sander vitreus'', Synonym (taxonomy), synonym ''Stizostedion vitreum''), also called the walleyed pike, yellow pike, yellow pikeperch or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern ...

yellow perch The yellow perch (''Perca flavescens''), commonly referred to as perch, striped perch, American perch or preacher is a freshwater perciform fish native to much of North America. The yellow perch was described in 1814 by Samuel Latham Mitchill fr ...

northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (pikes). They are commonly found in brackish water, moderately salty and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). T ...

lake trout The lake trout (''Salvelinus namaycush'') is a freshwater Salvelinus, char living mainly in lakes in Northern North America. Other names for it include mackinaw, namaycush, lake char (or charr), touladi, togue, laker, and grey trout. In Lake Sup ...

Arctic grayling The Arctic grayling (''Thymallus arcticus'') is a species of freshwater fish in the salmon family Salmonidae. ''T. arcticus'' is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missou ...

lake whitefish The lake whitefish (''Coregonus clupeaformis'') is a species of freshwater whitefish from North America. Lake whitefish are found throughout much of Canada and parts of the northern United States, including all of the Great Lakes. The lake white ...

cisco Cisco Systems, Inc. (using the trademark Cisco) is an American multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, s ...

white sucker The white sucker (''Catostomus commersonii'') is a species of freshwater cypriniform fish inhabiting the upper Midwest and Northeast in North America, but it is also found as far south as Georgia and as far west as New Mexico. The fish is common ...

longnose sucker The longnose sucker (''Catostomus catostomus'') is a species of cypriniform freshwater fish in the family Catostomidae. It is native to North America from the northern United States to the top of the continent. It is also found in Russia in riv ...

and

burbot The burbot (''Lota lota''), also known as bubbot, mariah, loche, cusk, freshwater cod, freshwater ling, freshwater cusk, the lawyer, coney-fish, lingcod, or eelpout, is a species of coldwater ray-finned fish native to the subarctic regions of ...

Conservation

Provincial park

The province of Saskatchewan has established the Clearwater River Provincial Park, encompassing an area of 865 mi²; or 2240 km², to protect the river's environment.Saskatchewan Parks
- Clearwater River Park

Canadian Heritage Rivers System

The Saskatchewan section was granted

status because of its "unspoiled, clear-water river in a pristine" isolated "wilderness setting of spectacular beauty".

Regional Aquatics Monitoring Program (RAMP)

The Regional Aquatics Monitoring Program (RAMP) uses the Clearwater River as a "baseline river system" to provide "information on the variability and characteristics of natural systems". Although natural outcrops of McMurray Formation oil sands are present along the river, the "lack of significant oil sands developments" within its watershed allows it to be used as a baseline.

References

External links

Map of the river's course
from Canadian Heritage Rivers System
Fish Species of Saskatchewan

Clearwater River Provincial Park
{{authority control Rivers of Alberta Rivers of Saskatchewan Canadian Heritage Rivers