Continental Divide of the Americas
The Continental Divide of the Americas stretches from the Bering Strait to the Strait of Magellan. It marks the principal hydrological boundary separating North and South America. This line follows high mountain peaks along the Rocky Mountains and Andes ranges. Water flowing west of this divide enters the Pacific Ocean. Rivers on the eastern side drain into the Atlantic or Arctic Oceans. The path includes the Gulf of Mexico, Caribbean Sea, and Hudson Bay drainage systems. Grays Peak in Colorado stands as the highest point of the divide in North America at 14,278 feet. The route passes through Arctic Alaska near the U.S., Canada border close to the Beaufort Sea. It zig-zags southward over Yukon forming part of the boundary between Yukon and Northwest Territories. The divide traverses Northern British Columbia Interior via Cassiar Mountains and Omineca Mountains. It reaches Summit Lake north of Prince George just south of McLeod Lake community. From there it crosses McGregor Plateau to the spine of Canadian Rockies southeast to the 120th meridian west. In Montana it forms the western boundary of Waterton Lakes National Park. Further south it bisects Glacier National Park before heading toward Helena and Butte. The divide crosses into Wyoming within Yellowstone National Park continuing southeast around Great Divide Basin. It proceeds south into western New Mexico passing along western boundary of endorheic Plains of San Agustin. In Mexico it passes through Chihuahua Durango Zacatecas Aguascalientes Jalisco Guanajuato Querétaro México Federal District Morelos Puebla Oaxaca and Chiapas. Central America sees the divide continue through southern Guatemala southwestern Honduras western Nicaragua Costa Rica and southern Panama. The lowest natural point occurs at Isthmus of Rivas in Nicaragua at 35 feet above sea level. In Panama the Canal cuts through it at 65 feet below sea level. South America follows Andes peaks traversing western Colombia central Ecuador western Peru eastern Chile. The divide ends at Cabo San Diego southern end of Patagonia and Tierra del Fuego.
Many endorheic regions complicate simple east or west ocean-bound water flow across North and South America. Several basins straddle or adjoin the Continental Divide including Great Divide Basin in Wyoming. The Plains of San Agustin and Animas Valley appear in New Mexico alongside Guzmán Basin spanning New Mexico and Chihuahua Mexico. Bolsón de Mapimí and Llanos el Salado exist within Mexican territory as well. These basins routinely assigned to one side by their lowest perimeter pass determine drainage overflow behavior. If a basin fills with water until overflowing, assignment becomes clear based on that threshold. Large-scale maps often show double divide lines when endorheic basins are involved. Detailed USGS topographic maps generally show only main Divide determined by overflow rule. This eliminates need to trace boundary for shallow basins like San Luis Closed Basin in Colorado. Lost streams of Idaho create another nebulous rim requiring special handling. A rare exception occurs when stream near divide splits flowing both directions simultaneously. North Two Ocean Creek exists on Continental Divide in Wyoming exhibiting this dual-flow characteristic. Isa Lake also located on Continental Divide in Wyoming demonstrates similar splitting behavior. Panama Canal shares this feature though it is man-made construction. Both Chagres and Gatun rivers flow into Gatun Lake emptying to both oceans. Several small lakes along Rocky Mountains between Alberta and British Columbia flow into both provinces. Committee's Punch Bowl sits in Athabasca Pass as example lake flowing into Arctic and Pacific Oceans. The Alpine Club of Canada Abbot Pass Hut sat directly astride Divide in Abbot Pass. Precipitation falling on eastern half roof flowed via Lake Louise into Hudson Bay. Rain falling on western half flowed via Lake O'Hara into Pacific Ocean.
Triple Divide Peak in Glacier National Park Montana marks convergence point where two principal continental divides meet. Primary Continental Divide intersects Northern or Laurentian Divide at this specific location. Waters from here flow to Pacific Ocean Atlantic Ocean via Gulf of Mexico and Arctic Ocean via Hudson Bay. Most geologists consider this point hydrological apex of North America since Hudson Bay generally part of Arctic Ocean. International Hydrographic Organization defines Hudson Bay with outlet extending 62.5 to 66.5 degrees north as Arctic Ocean Subdivision 9.11. Summit of peak represents world only oceanic triple divide point without Antarctica ice sheets. Only one other continent borders three oceans yet inward-draining Endorheic basin area Central Asia vastness prevents proximity. North America status having single location draining into three oceans remains unique globally. Sources differ whether Hudson Bay entirely south Arctic Circle belongs Atlantic or Arctic Ocean. Hudson Bay water budget connects more to Atlantic than Arctic Ocean channels. Channels north Hudson Bay largely cut off by Baffin Island from Arctic waters. Much water entering mixes with Atlantic east via Hudson Strait rather than north into Arctic. Result means most ice flowing down Saskatchewan Glacier eventually ends up as water in Atlantic Ocean. If Hudson Bay considered part Atlantic then triple point shifts to permanently snow covered hump border Alberta British Columbia. Location sits southern slope Snow Dome at elevation 3,456 meters above sea level. Exact location somewhat indeterminate because Columbia Icefield snow shifts year to year. Snow falling about 10 feet per year does not flow downhill as water but creeps as glacial ice. Ice flows down Athabasca Glacier to Arctic Ocean via Athabasca and Mackenzie rivers. Ice flowing west goes Pacific Ocean via Bryce Creek Bush and Columbia Rivers. Ice flowing down Saskatchewan Glacier goes via North Saskatchewan Saskatchewan Nelson rivers into Hudson Bay. Secondary triple points exist wherever any two continental divides meet across North America. Five major drainage systems include Pacific Atlantic Arctic oceans plus Hudson Bay Gulf of Mexico. International Hydrographic Organization adds sixth Canada Northwest Passage basin making six total systems. Four secondary continental divides create three secondary triple points including mentioned previous ones. Third near Hibbing Minnesota where Northern Divide intersects Saint Lawrence Seaway divide exists without true consensus on continental divide definition.
The Treaty of 1818 used Continental Divide as eastern boundary Oregon Country region. United Kingdom United States maintained condominium status over area until Oregon Treaty divided territory between Britain and United States in 1846. The divide forms western boundary Waterton Lakes National Park in Canada while bisecting Glacier National Park in US. It crosses into United States northwestern Montana at boundary between Waterton Lakes National Park and Glacier National Park. Further south the divide forms backbone Rocky Mountain Front Front Range Bob Marshall Wilderness. Head south towards Helena Butte then west past namesake community Divide Montana through Anaconda-Pintler Wilderness. Bitterroot Range forms eastern third state boundary between Idaho and Montana. In Wyoming within Yellowstone National Park continues southeast around Great Divide Basin Sierra Madre Range into Colorado. Highest point North America summit Grays Peak reaches 14,278 feet elevation. Crosses US Hwy 160 southwestern Colorado Wolf Creek Pass line symbolizes division there. Proceeds south western New Mexico passing along western boundary endorheic Plains San Agustin. Does not always follow highest ranges peaks each state province despite representing height land between watersheds. In Mexico passes Chihuahua Durango Zacatecas Aguascalientes Jalisco Guanajuato Querétaro México Federal District Morelos Puebla Oaxaca Chiapas. Central America continues southern Guatemala southwestern Honduras western Nicaragua Costa Rica southern Panama. Lowest natural point Central America Isthmus Rivas Nicaragua at 35 feet above sea level. Panama Canal cuts through it at 65 feet below sea level. South America follows Andes peaks traversing western Colombia central Ecuador western Peru eastern Chile. Essentially conforms Chile-Bolivia Chile-Argentina boundaries southward Cabo San Diego southern Patagonia Tierra del Fuego. Punta Cancanan Pass Peru occurs at elevation 11,975 feet above sea level.
Continental Divide National Scenic Trail CDT follows Divide through United States from Mexico-US border Canada-US border. Trail itself corridor pathways dedicated footpaths back roads either on near Continental Divide. Less-developed Canadian extension called Great Divide Trail continues five national parks six provincial parks. Ends Kakwa Lake east-central British Columbia providing hiking mountain biking opportunities for enthusiasts. Often remains above treeline Divide providing unobstructed views along route throughout journey. The trail spans multiple states including Montana Wyoming Colorado New Mexico and others across North America. It connects wilderness areas like Bob Marshall Wilderness Glacier National Park Yellowstone National Park. Hikers traverse Rocky Mountains Front Range Sierra Madre Range into Colorado reaching highest points. Mountain bikers follow Great Divide Mountain Bike Route alongside traditional hiking paths. Provincial parks in British Columbia offer additional terrain exploration beyond US borders. The path winds through diverse ecosystems from Arctic Alaska to tropical Central American regions. Each segment presents unique challenges ranging from high alpine passes to desert valleys. Water sources become critical considerations when traversing long stretches without reliable supply points. Weather conditions change rapidly affecting safety and accessibility of various sections year round. Permits required for certain segments ensuring protection fragile environments along entire length. Rangers monitor trail usage maintaining infrastructure while preserving natural character untouched by development.
Sources differ regarding Hudson Bay classification impacting secondary triple point location determination significantly. Most geographers consider Hudson Bay part Arctic Ocean despite being entirely south Arctic Circle. International Hydrographic Organization current unapproved working edition Limits Oceans Seas defines Hudson Bay as Arctic Ocean Subdivision 9.11. Channels north Hudson Bay largely cut off Baffin Island preventing direct connection Arctic waters. Much water entering mixes Atlantic east via Hudson Strait rather flowing north into Arctic proper. Result means most ice flowing down Saskatchewan Glacier eventually ends up water Atlantic Ocean instead. If Hudson Bay considered part Atlantic then triple point shifts permanently snow covered hump border Alberta British Columbia. Location sits southern slope Snow Dome at elevation 3,456 meters above sea level. Exact location somewhat indeterminate because Columbia Icefield snow shifts year to year unpredictably. Snow falling about 10 feet per year does not flow downhill water but creeps glacial ice slowly. Ice flows Athabasca Glacier Arctic Ocean via Athabasca Mackenzie rivers westward Pacific Ocean Bryce Creek Bush Columbia Rivers. Ice flowing down Saskatchewan Glacier goes North Saskatchewan Saskatchewan Nelson rivers into Hudson Bay ultimately. Secondary triple points exist wherever any two continental divides meet across North America landscape. Five major drainage systems include Pacific Atlantic Arctic oceans plus Hudson Bay Gulf of Mexico total five. International Hydrographic Organization adds sixth Canada Northwest Passage basin making six total systems overall. Four secondary continental divides create three secondary triple points including mentioned previous ones previously discussed. Third near Hibbing Minnesota where Northern Divide intersects Saint Lawrence Seaway divide exists without true consensus definition. No real agreement exists where secondary triple points located due to varying definitions used globally. Main Continental Divide described article far more distinctive geological feature than others involved here. Two main triple points much more prominent compared remaining minor intersections scattered throughout region.
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Common questions
Where does the Continental Divide of the Americas start and end?
The Continental Divide of the Americas stretches from the Bering Strait to Cabo San Diego at the southern end of Patagonia and Tierra del Fuego. This hydrological boundary follows high mountain peaks along the Rocky Mountains and Andes ranges throughout North and South America.
What is the highest point on the Continental Divide of the Americas in North America?
Grays Peak in Colorado stands as the highest point of the divide in North America at 14,278 feet elevation. The route passes through Arctic Alaska near the U.S., Canada border close to the Beaufort Sea before zig-zagging southward over Yukon.
How many oceans does water flow into from Triple Divide Peak in Glacier National Park Montana?
Waters from Triple Divide Peak in Glacier National Park Montana flow into three oceans including the Pacific Ocean Atlantic Ocean via Gulf of Mexico and Arctic Ocean via Hudson Bay. Most geologists consider this point the hydrological apex of North America since Hudson Bay generally forms part of the Arctic Ocean.
Which states and countries does the Continental Divide of the Americas pass through?
The divide traverses western United States states including Montana Wyoming Colorado New Mexico and passes through Mexico Central American nations Guatemala Honduras Nicaragua Costa Rica Panama and South American countries Colombia Ecuador Peru Chile. It ends at Cabo San Diego southern end of Patagonia and Tierra del Fuego after following Andes peaks.
Where is the lowest natural point on the Continental Divide of the Americas located?
The lowest natural point occurs at Isthmus of Rivas in Nicaragua at 35 feet above sea level. In Panama the Canal cuts through it at 65 feet below sea level creating a man-made exception to the natural boundary.