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46-833: On the Continental Divide in the Bitterroot Range , it marks the transition between the Beaverhead Mountains and the Centennial Mountains . Its name is derived from the states that it separates, "Mon" from Montana and "-ida" from Idaho . The pass forms part of the border between eastern Idaho and southwestern Montana , and is between the towns of Spencer in Clark County and Lima in Beaverhead County . On

92-781: A small lake located in the Athabasca Pass . The Alpine Club of Canada 's Abbot Pass Hut sat directly astride the Divide in Abbot Pass on the boundary between Banff National Park and Yoho National Park , and thus precipitation falling on the eastern half of the roof flowed via Lake Louise into Hudson Bay, while rain falling on the western half flowed via Lake O'Hara into the Pacific Ocean. Canadian Rockies The Canadian Rockies ( French : Rocheuses canadiennes ) or Canadian Rocky Mountains , comprising both

138-667: Is considered part of the Atlantic, then the triple point is at an unimportant-looking, permanently snow and ice covered hump on the border between Alberta and British Columbia , on the southern slope of Snow Dome at 3,456 metres (11,300 ft). The exact location of this potential triple point is somewhat indeterminate because the Columbia Icefield and the snow on top of it shifts from year to year. The snow that falls on it (about 10 metres (33 ft) per year) does not actually flow downhill as water, but creeps downhill in

184-683: Is much lower in the Canadian Rockies than in the American Rockies. Five national parks are located within the Canadian Rockies, four of which are adjacent and make up the Canadian Rocky Mountain Parks . These four parks are Banff , Jasper , Kootenay and Yoho . The fifth national park, Waterton Lakes , is not adjacent to the others. Waterton Lakes lies farther south, straddling the Canada–US border as

230-785: Is the eastern part of the Pacific Ring of Fire that runs all the way around the Pacific Ocean . The Canadian Rockies are bounded on the east by the Canadian Prairies, on the west by the Rocky Mountain Trench, and on the north by the Liard River. Contrary to popular misconception, the Rockies do not extend north into Yukon or Alaska, or west into central British Columbia. North of the Liard River,

276-460: Is the main reason behind the designation of Waterton-Glacier International Peace Park as the "Crown of the Continent" of North America. The summit of the peak is the world's only oceanic triple divide point. Discounting Antarctica and its ice sheets, only one other continent ( Asia ) borders three oceans, but the inward-draining Endorheic basin area of Central Asia from western China to

322-510: Is the second-highest peak in the Canadian Rockies, and is the highest mountain in Alberta. Snow Dome (3,456 m; 11,339 ft) is one of two hydrological apexes of North America. Water flows off Snow Dome into three different watersheds, into the Pacific Ocean, Arctic Ocean , and Atlantic Ocean via Hudson Bay . The Canadian Rockies are not the highest mountain ranges in Canada. Both

368-679: Is the world's only oceanic triple divide, there are secondary triple divide points wherever any two continental divides meet. North America has five major drainage systems: into the Pacific, Atlantic and Arctic oceans, plus Hudson Bay and the Gulf of Mexico. Other sources such as the International Hydrographic Organization add a sixth: Canada's Northwest Passage basin. Using just the five, there are four secondary continental divides and three secondary triple points,

414-971: The Alberta Rockies and the British Columbian Rockies, is the Canadian segment of the North American Rocky Mountains . It is the easternmost part of the Canadian Cordillera , which is the northern segment of the North American Cordillera , the expansive system of interconnected mountain ranges between the Interior Plains and the Pacific Coast that runs northwest–southeast from central Alaska to

460-519: The Aral and Caspian Seas is so vast that any Arctic and Indian Ocean tributaries are never within proximity of each other. Thus, North America's status of having a single location draining into three oceans is unique in the world. Sources differ, however, on whether Hudson Bay, entirely south of the Arctic Circle , is part of the Atlantic or Arctic Ocean. Hudson Bay's water budget connects to

506-764: The Atlantic and Arctic Ocean , including those that drain into the Gulf of Mexico , the Caribbean Sea , and Hudson Bay . Although there are many other hydrological divides in the Americas, the Continental Divide is by far the most prominent of these because it tends to follow a line of high peaks along the main ranges of the Rocky Mountains and Andes , at a generally much higher elevation than

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552-640: The Great Divide Basin , through the Sierra Madre Range into Colorado where it reaches its highest point in North America at the summit of Grays Peak at 4,352 metres (14,278 ft). It crosses US Hwy 160 in southwestern Colorado at Wolf Creek Pass , where a line symbolizes the division. The Divide then proceeds south into western New Mexico , passing along the western boundary of the endorheic Plains of San Agustin. Although

598-844: The Hudson Bay - Arctic Ocean drainage region from the Atlantic watershed region. Secondary divides separate the watersheds that flow into the Great Lakes and Saint Lawrence River (ultimately into the Atlantic) from watersheds that flow to the Gulf of Mexico (also part of the Atlantic Ocean) via the Missouri-Mississippi-Ohio river system . Another secondary divide follows the Appalachian chain, which separates those streams and rivers that flow directly into

644-733: The Isthmus of Rivas at 47 metres (154 ft) in Nicaragua. In Panama, the Canal cuts through it at 26 metres (85 ft). The Divide continues into South America , where it follows the peaks of the Andes Mountains , traversing western Colombia , central Ecuador , western and southwestern Peru , and eastern Chile (essentially conforming to the Chile- Bolivia and Chile- Argentina boundaries), southward to Cabo San Diego at

690-882: The Isthmus of Tehuantepec in Mexico . Canada officially defines the Rocky Mountains system as the mountain chains east of the Rocky Mountain Trench extending from the Liard River valley in northern British Columbia to the Albuquerque Basin in New Mexico , not including the Mackenzie , Richardson and British Mountains / Brooks Range in Yukon and Alaska (which are all included as

736-674: The Mackenzie Mountains , which are a distinct mountain range, form a portion of the border between the Yukon and the Northwest Territories . The mountain ranges to the west of the Rocky Mountain Trench in southern British Columbia are called the Columbia Mountains , and are not considered to be part of the Rockies by Canadian geologists. Mount Robson (3,954 metres; 12,972 feet) is the highest peak in

782-599: The Northern Rockies which comprise two main groupings, the Hart Ranges and the Muskwa Ranges . The division-point of the two main groupings is at Monkman Pass northwest of Mount Robson and to the southwest of Mount Ovington . The Canadian Rockies are noted for being the source of several major river systems, and also for the many rivers within the range itself. The Rockies form the divide between

828-626: The Northwest Territories in the Mackenzie Mountains . It then proceeds through the Northern British Columbia Interior via the Cassiar Mountains , Omineca Mountains and northern Nechako Plateau to Summit Lake , north of the city of Prince George and just south of the community of McLeod Lake . From there the Divide traverses the McGregor Plateau to the spine of the Rockies, following

874-737: The "Arctic Rockies" in the United States ' definition of the Rocky Mountains system). The Canadian Rockies, being the northern segment of this chain, is thus defined as comprising the central-eastern section of the North American Cordillera, between the Prairies of Alberta and the Liard Plain of northeastern British Columbia to the east and the Interior Mountains / Plateau and Columbia Mountains to

920-563: The American Rockies are made mostly of metamorphic and igneous rock such as gneiss and granite . The Canadian Rockies are overall more jagged than the American Rockies, because the Canadian Rockies have been more heavily glaciated , resulting in sharply pointed mountains separated by wide, U-shaped valleys gouged by glaciers, whereas the American Rockies are overall more rounded, with river-carved V-shaped valleys between them. The Canadian Rockies are cooler and wetter, giving them moister soil, bigger rivers, and more glaciers. The tree line

966-746: The Americas (also known as the Great Divide , the Western Divide or simply the Continental Divide ; Spanish : Divisoria continental de las Américas, Gran Divisoria ) is the principal, and largely mountainous , hydrological divide of the Americas . The Continental Divide extends from the Bering Strait to the Strait of Magellan , and separates the watersheds that drain into the Pacific Ocean from those river systems that drain into

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1012-816: The Atlantic Ocean from those that exit via the Ohio and Mississippi Rivers. Triple Divide Peak in Glacier National Park , Montana, is the point where two of the principal continental divides in North America converge, the primary Continental Divide and the Northern or Laurentian Divide. From this point, waters flow to the Pacific Ocean, the Atlantic Ocean via the Gulf of Mexico, and the Arctic Ocean via Hudson Bay . Most geographers, geologists, meteorologists, and oceanographers consider this point

1058-649: The Atlantic more than to the Arctic Ocean. The channels to the north of Hudson Bay are largely cut off by Baffin Island from the Arctic, so much of the water that enters it mixes with the Atlantic to the east via Hudson Strait rather than north into the Arctic. The result is that most of the ice flowing down the Saskatchewan Glacier eventually ends up as water in the Atlantic Ocean. If Hudson Bay

1104-681: The Canadian Rockies, but not the highest in British Columbia, since there are some higher mountains in the Coast Mountains and Saint Elias Mountains . Mount Robson lies on the continental divide near Yellowhead Pass , one of the lowest passes in the Canadian Rockies, and is close to the Yellowhead Highway . Its base is 985 m (3,232 ft) above sea level, with a total vertical relief of 2,969 m (9,741 ft). Mount Columbia (3,747 m; 12,293 ft)

1150-557: The Canadian part of the Waterton-Glacier International Peace Park . The four adjacent parks, combined with three British Columbia provincial parks, were declared a single UNESCO World Heritage Site in 1984 for the unique mountain landscapes found there. Numerous provincial parks are located in the Canadian Rockies, including Hamber , Mount Assiniboine and Mount Robson parks. Throughout

1196-405: The Continental Divide in Wyoming. The Panama Canal has this same feature, but is man-made. Both the Chagres and Gatun rivers flow into Gatun Lake , which empties to both oceans. Several small lakes along the Divide in the Rocky Mountains between Alberta and British Columbia flow into both provinces and thus into both the Arctic and Pacific Oceans. An example is the " Committee's Punch Bowl ",

1242-414: The Divide or the other by their lowest perimeter pass; in other words, an assignment is made by determining how the drainage would occur if the basin were to be progressively filled with water until it overflowed. Large-scale maps, such as those on this page, often show double divide lines when endorheic basins are involved. However, the detailed USGS topographic maps of the United States generally show only

1288-581: The Divide represents the height of land between watersheds, it does not always follow the highest ranges/peaks within each state or province. In Mexico , it passes through Chihuahua , Durango , Zacatecas , Aguascalientes , Jalisco , Guanajuato , Querétaro , México , the Federal District , Morelos , Puebla , Oaxaca , and Chiapas . In Central America, it continues through southern Guatemala , southwestern Honduras , western Nicaragua , western/southwestern Costa Rica , and southern Panama . The divide reaches its lowest natural point in Central America at

1334-436: The Idaho side is Beaver Creek running through Beaver Canyon, which was the route of the Utah and Northern Railway in 1880 and is still used by Union Pacific. Union Pacific once had an icemaking plant at Humphrey, Idaho , which is now a ghost town ; Monida, Montana , which is near the top of the pass, is also almost a ghost town, as only seven people now live there at 6,780 feet (2,067 m), ninety feet (27 m) below

1380-522: The Pacific Ocean drainage on the west and that of Hudson Bay and the Arctic Ocean on the east. Of the range's rivers, only the Peace River penetrates the range. Notable rivers originating in the Canadian Rockies include the Fraser , Columbia , North Saskatchewan , Bow and Athabasca Rivers . The Canadian Rockies are quite different in appearance and geology from the American Rockies to the south of them. The Canadian Rockies are composed of layered sedimentary rock such as limestone and shale , whereas

1426-421: The Rockies, and especially in the national parks, the Alpine Club of Canada maintains a series of alpine huts for use by mountaineers and adventurers. The Canadian Pacific Railway was founded to provide a link from the province of British Columbia to the eastern provinces. The main difficulty in providing such a link were the Rockies themselves: treacherous mountain passes, fast rivers and sheer drops made for

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1472-435: The Saint Elias Mountains (highest point in Canada Mount Logan at 5,959 m; 19,551 ft) and the Coast Mountains (highest point Mount Waddington at 4,016 m; 13,176 ft) have higher summits. The Canadian Rockies are subdivided into numerous mountain ranges , structured in two main groupings, the Continental Ranges , which has three main subdivisions, the Front Range , Park Ranges and Kootenay Ranges , and

1518-514: The US bisects Glacier National Park. Further south, the Divide forms the backbone of the Rocky Mountain Front (Front Range) in the Bob Marshall Wilderness , heads south towards Helena and Butte , then west past the namesake community of Divide, Montana , through the Anaconda-Pintler Wilderness to the Bitterroot Range , where it forms the eastern third of the state boundary between Idaho and Montana. The Divide crosses into Wyoming within Yellowstone National Park and continues southeast around

1564-403: The boundary is at the Canada–United States border on 49th parallel north , but in geological terms it might be considered to be at Marias Pass in northern Montana. The Canadian Rockies have numerous high peaks and ranges, such as Mount Robson (3,954 metres; 12,972 feet) and Mount Columbia (3,747 m; 12,293 ft). The Canadian Rockies are composed of shale and limestone . Much of

1610-403: The crest of the Canadian Rockies southeast to the 120th meridian west , from there forming the boundary between southern British Columbia and southern Alberta . The Divide crosses into the United States in northwestern Montana , at the boundary between Waterton Lakes National Park and Glacier National Park . In Canada, it forms the western boundary of Waterton Lakes National Park, and in

1656-420: The form of glacial ice. That ice flows down the Athabasca Glacier to the Arctic Ocean via the Athabasca and Mackenzie rivers. Ice flowing west goes to the Pacific Ocean via Bryce Creek and the Bush and Columbia Rivers . Ice flowing down the Saskatchewan Glacier goes via the North Saskatchewan , Saskatchewan , and Nelson rivers into Hudson Bay . While Triple Divide Peak (or, alternatively, Snow Dome)

1702-525: The hydrological apex of North America, as Hudson Bay is generally considered part of the Arctic Ocean. For example, the International Hydrographic Organization (in its current unapproved working edition only of Limits of Oceans and Seas ) defines the Hudson Bay, with its outlet extending from 62.5 to 66.5 degrees north (just a few miles south of the Arctic Circle ) as being part of the Arctic Ocean, specifically "Arctic Ocean Subdivision 9.11." This hydrological apex of North America status of Triple Divide Peak

1748-525: The main Divide as determined by the overflow rule. Among other things, this eliminates the need to trace out the boundary for a basin that is very shallow and has a nebulous rim, such as the San Luis Closed Basin in Colorado and the basin of the lost streams of Idaho . Another rare exception occurs when a stream near a divide splits and flows in both directions, or a lake straddling the divide overflows in both directions. Examples of these are, respectively, North Two Ocean Creek and Isa Lake , both located on

1794-409: The other hydrological divisions. Beginning at the westernmost point of the Americas , Cape Prince of Wales , just south of the Arctic Circle, the Continental Divide's geographic path runs through Arctic Alaska , where it reaches its more northerly point close to the U.S.-Canada border near the Beaufort Sea. The Divide zig-zags southwardly over Yukon , and forms part of the boundary between Yukon and

1840-599: The others and its two main triple points are much more prominent. The Continental Divide National Scenic Trail (CDT) follows the Divide through the U.S. from the Mexico–US border to the Canada–US border . The trail itself is a corridor of pathways; that is, dedicated footpaths or back roads, either on or near the Continental Divide. A less-developed Canadian extension called the Great Divide Trail continues through five national parks and six provincial parks , ending at Kakwa Lake in east-central British Columbia. Many endorheic regions in North and South America complicate

1886-427: The pass on I-15. In the late 19th century, stagecoaches ferried tourists from the railroad at Monida Pass to Yellowstone National Park , until UP built a branch line to the park over Reas Pass . Interstate 15 , the "Veterans Memorial Highway," runs through the pass and north to the international boundary with Canada at Sweetgrass . Continental Divide of the Americas The Continental Divide of

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1932-451: The range is protected by national and provincial parks, several of which collectively comprise a World Heritage Site . The Canadian Rockies are the easternmost part of the Canadian Cordillera , the collective name for the mountains of Western Canada . They form part of the American Cordillera , an essentially continuous sequence of mountain ranges that runs all the way from Alaska to the very tip of South America. The Cordillera, in turn,

1978-427: The simple view of east or west, "ocean-bound" water flow. Several endorheic basins straddle or adjoin the Continental Divide, notably the Great Divide Basin in Wyoming, the Plains of San Agustin and the Animas Valley in New Mexico, the Guzmán Basin in New Mexico and Chihuahua, Mexico, and both the Bolsón de Mapimí and the Llanos el Salado in Mexico. Such basins can be, and routinely are, assigned to one side of

2024-419: The southern end of Patagonia and Tierra del Fuego . The Divide passes through the Punta Cancanan Pass in Peru at 4,700 metres (15,420 ft). The Arctic Divide or Northern Divide in northern and western Canada separates the Arctic Ocean watershed from the Hudson Bay watershed. Another, mainly non-mountainous, divide, the Laurentian Divide (also sometimes called the Northern Divide), further separates

2070-400: The two mentioned previously and a third near Hibbing, Minnesota , where the Northern Divide intersects the Saint Lawrence Seaway divide. Since there is no true consensus on what a continental divide is, there is no real agreement on where the secondary triple points are located. However, the main Continental Divide described in this article is a far more distinctive geological feature than

2116-524: The west. It is divided into the Northern Rockies (which is further subdivided into the Muskwa and Hart Ranges ) and Continental Ranges , separated by the McGregor River valley, the McGregor Pass and the Kakwa River valley. The southern end of the Canadian Rockies extends into the U.S. state of Montana at various sites such as the Wilson Range , Upper Waterton Lake , Boundary Creek , Cameron Lake , Forum Peak , Long Knife Peak , North Fork Flathead River and Frozen Lake . In geographic terms,

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