Aa mountain pass is a navigable route through a mountain range or over a ridge . Since mountain ranges can present formidable barriers to travel, passes have played a key role in trade, war, and both human and animal migration throughout history. At lower elevations it may be called a hill pass . A mountain pass is typically formed between two volcanic peaks or created by erosion from water or wind.
26-697: Kootenay Pass , known locally as "the Salmo–Creston" is a mountain pass in the Selkirk Mountains of British Columbia , Canada. The pass summit divides the drainage basin of the Pend d'Oreille River on the west (via tributaries Stagleap Creek , the South Salmo River and the Salmo River ) from that of Kootenay River / Kootenay Lake to the east (via tributary Summit Creek ). It
52-403: A gap , saddle , col or notch . A topographic saddle is analogous to the mathematical concept of a saddle surface , with a saddle point marking the minimum high point between two valleys and the lowest point along a ridge. On a topographic map , passes can be identified by contour lines with an hourglass shape, which indicates a low spot between two higher points. In the high mountains,
78-702: A crescent-shaped area south of Argentina's territorial sea as defined in the 1984 treaty with Chile. This area was also claimed by Chile as part of its presential sea , and the sea surrounding the Antarctic Peninsula , which is claimed by all three aforementioned countries. That same year, on May 8, Chile submitted its Preliminary Report to the United Nations Commission on the Limits of the Continental Shelf. In 2020,
104-502: A difference of 2,000 meters (6,600 ft) between the summit and the mountain is defined as a mountain pass. Passes are often found just above the source of a river , constituting a drainage divide . A pass may be very short, consisting of steep slopes to the top of the pass, or a valley many kilometers long, whose highest point might only be identifiable by surveying . Roads and railways have long been built through passes. Some high and rugged passes may have tunnels bored underneath
130-531: A nearby mountainside, as with the Eisenhower Tunnel bypassing Loveland Pass in the Rockies, to allow faster traffic flow throughout the year. The top of a pass is frequently the only flat ground in the area, and may be a high vantage point. In some cases this makes it a preferred site for buildings. If a national border follows the ridge of a mountain range, a pass over the mountains is typically on
156-786: A style of street racing which may take place on these roads. There are thousands of named passes around the world, some of which are well-known, such as the Khyber Pass close to the present-day Afghanistan-Pakistan border on the ancient Silk Road , the Great St. Bernard Pass at 2,473 metres (8,114 ft) in the Alps , the Chang La at 5,360 metres (17,590 ft), the Khardung La at 5,359 metres (17,582 ft) in Ladakh , India and
182-888: Is also used, particularly in Europe. In the highest mountain range in the world, the Himalayas, passes are denoted by the suffix "La" in Tibetan, Ladhakhi, and several other regional languages. Examples are the Taglang La at 5,328 m (17,480 ft) on the Leh-Manali highway , and the Sia La at 5,589 m (18,337 ft) in the Eastern Karakoram range. Scotland has the Gaelic term bealach (anglicised "balloch"), while Wales has
208-499: Is done by a Gazex system that allows avalanche technicians to trigger avalanches remotely from the comfort of their office at the summit, visible from the summit webcam. This Gazex system has allowed for the removal of large artillery stations that were used to fire ballistic shells into start zones. On occasion, artillery shells would not explode and had to be found and destroyed during summer months with considerable expense and danger. Mountain pass Mountain passes make use of
234-665: Is open year-round, although it is frequently closed in bad weather for avalanche control and clearing of debris. Bow Summit on the Icefields Parkway in Banff National Park , Alberta, is higher at 2,088 m (6,850 ft). Highwood Pass in Kananaskis Country , Alberta, is even higher at 2,206 m (7,238 ft), but it is traversed by Highway 40 , which closes from December 1 to June 15 every year. Most avalanche control at Kootenay Pass
260-771: Is the Brenner pass in the Alps . Some mountain passes above the tree line have problems with snow drift in the winter. This might be alleviated by building the road a few meters above the ground, which will make snow blow off the road. There are many words for pass in the English-speaking world. In the United States, pass is very common in the West , the word gap is common in the southern Appalachians , notch in parts of New England , and saddle in northern Idaho . The term col , derived from Old French,
286-740: Is used by the Crowsnest Highway to transverse the Selkirks, connecting the communities of Salmo and Creston . At its opening the highway route was also dubbed the Kootenay Skyway . The pass summit is located within Stagleap Provincial Park near Bridal Lake . A webcam operates year-round showing the current conditions of the pass. The Kootenay Pass is one of the highest highway-served passes in Canada that
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#1732782970068312-676: The Andes and on the islands of Tierra del Fuego . However, there are some border disputes , particularly around the Southern Patagonian Ice Field . It is the largest border of the two countries, beating the Argentina–Paraguay and Chile–Bolivia , Argentina's and Chile's second largest borders, respectively. The northern end of the border is a tripoint it forms with those at the Argentina–Bolivia border and
338-694: The Argentine Chamber of Deputies unanimously approved the outer limit of the Argentine Continental Shelf in Law 27,557. That same year, on December 21, Chile submitted to the United Nations Commission on the Limits of the Continental Shelf the partial report on the extended continental shelf in Easter Island and Salas y Gómez . In 2021, Chilean President Sebastián Piñera signed Supreme Decree No. 95, which outlined
364-647: The Bolivia-Chile border in the arid Puna de Atacama plateau. The border extends south until reaching the sea at the same place the Strait of Magellan meets the Atlantic Ocean . Further south the border on the Isla Grande de Tierra del Fuego follows a meridian separating the island into two. This boundary reaches the sea at Beagle Channel a few kilometers southwest of Ushuaia . In November 1984
390-594: The Palakkad Gap at 140 metres (460 ft) in Palakkad , Kerala , India . The roads at Mana Pass at 5,610 metres (18,410 ft) and Marsimik La at 5,582 metres (18,314 ft), on and near the China–India border respectively, appear to be world's two highest motorable passes. Khunjerab Pass between Pakistan and China at 4,693 metres (15,397 ft) is also a high-altitude motorable mountain pass. One of
416-488: The historical dispute . However both countries didn't agree in the section between Mount Fitz Roy and Mount Murallón , and the border is still pending to be defined. Only Chile shows this on the cartography, while Argentina shows its pre-1998 claim, not following the new border between Murallón and Daudet from the agreement, nor indicating the pending section. The territorial claims of Argentina and Chile over Antarctica partially overlap with each other. Chile claims for itself
442-628: The Chilean Antarctic Territory, which is included in the Region of Magallanes and Chilean Antarctica, while Argentina claims Argentine Antarctica, whose territory is part of the Province of Tierra del Fuego, Antarctica and South Atlantic Islands. Both countries recognize each other's territories that do not overlap with their own as stipulated in the protocols of 1947, 1948, 1964, 1971 and 1978. The United Nations Convention on
468-582: The Law of the Sea ( UNCLOS ) of April 30, 1982, which entered into force on November 16, 1994, established the regime of the continental shelf in Part VI (Articles 76 to 85) , defining in Article 76, paragraph 1 what is understood as a continental shelf. Argentina ratified the convention on January 12, 1995, and it came into force for the country on December 31, 1995. On August 25, 1997, Chile signed and ratified
494-708: The United Nations Convention on the Law of the Sea, and it entered into force for the country on September 24, 1997. In 2009, Argentina submitted a presentation to the United Nations Commission on the Limits of the Continental Shelf, which was accepted in 2016 by the UNCLOS . The map in the submission included the disputed territories with the United Kingdom , such as the Falkland Islands , South Georgia , and South Sandwich Islands ,
520-747: The Western Continental Shelf of the Chilean Antarctic Territory . In August of the same year, Chile made the oral presentations of both partial submissions during the 55th Session of the Commission on the Limits of the Continental Shelf at the United Nations in New York. In 2023, Chile, through SHOA, made available an illustrative graphic showing all the maritime areas claimed by the country, which
546-407: The border, and there may be a border control or customs station, and possibly a military post. For instance, Argentina and Chile share the world's third-longest international border , 5,300 kilometres (3,300 mi) long, which runs north–south along the Andes mountains and includes 42 mountain passes. On a road over a pass, it is customary to have a small roadside sign giving the name of
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#1732782970068572-732: The continental shelf east of the 67º 16' 0 meridian as part of Chile's continental shelf (not the extended one) area projected from the Diego Ramírez Islands, also claiming the crescent area that Argentina considers part of its extension achieved under the extended continental shelf principle. This was reflected in the SHOA Chart No. 8 and prompted a response from the Argentine Foreign Ministry against Chile's measure. In February 2022, Chile submitted its second partial presentation regarding
598-674: The famous but non-motorable mountain passes is Thorong La at 5,416 metres (17,769 ft) in Annapurna Conservation Area , Nepal. Argentina%E2%80%93Chile border The Argentina–Chile border is the longest international border of South America and the third longest in the world after the Canada–United States border and the Kazakhstan–Russia border . With a length of 5,308 kilometres (3,298 mi ), it separates Argentina from Chile along
624-479: The pass and its elevation above mean sea level . Apart from offering relatively easy travel between valleys, passes also provide a route between two mountain tops with a minimum of descent. As a result, it is common for tracks to meet at a pass; this often makes them convenient routes even when travelling between a summit and the valley floor. Passes traditionally were places for trade routes, communications, cultural exchange, military expeditions etc. A typical example
650-696: The similar bwlch (both being insular Celtic languages). In the Lake District of north-west England, the term hause is often used, although the term pass is also common—one distinction is that a pass can refer to a route, as well as the highest part thereof, while a hause is simply that highest part, often flattened somewhat into a high-level plateau. In Japan they are known as tōge , which means "pass" in Japanese. The word can also refer to narrow, winding roads that can be found in and around mountains and geographically similar areas, or specifically to
676-529: The southern border area was finally established after long negotiations and mediation of John Paul II by the Treaty of Peace and Friendship of 1984 between Chile and Argentina , a perpetual treaty, signed at the Vatican by representatives of both countries. On 16 December 1998, an agreement between Argentina and Chile was signed to redefine the border line from Mount Fitz Roy and Mount Daudet and finish with
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