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56-523: Megalong Valley is part of the Blue Mountains of New South Wales , Australia . It is located west of Katoomba . On its eastern side, the valley is separated from the Jamison Valley by Narrow Neck Plateau. The Shipley Plateau overlooks part of the valley. The name Megalong Valley is said to be derived from an Aboriginal word thought to mean 'Valley Under The Rock'. Megalong Valley

112-471: A dissected plateau carved in sandstone bedrock . They are now a series of ridge lines separated by gorges up to 760 metres (2,490 ft) deep. The highest point in the Blue Mountains, as it is now defined, is an unnamed point with an elevation of 1,189 m (3,901 ft) AHD , located 7 kilometres (4.3 mi) north-east of Lithgow . However, the highest point in the broader region that

168-533: A generally southeasterly direction for about 96 kilometres (60 mi), terminating at Emu Plains . For about two-thirds of its length it is traversed by the Great Western Highway , the Main Western railway line and the proposed Blue Mountains tunnel. Several established towns are situated on its heights, including Katoomba , Blackheath , Mount Victoria , and Springwood . The range forms

224-627: A mix of different orogenic expressions and terranes , for example thrust sheets , uplifted blocks , fold mountains, and volcanic landforms resulting in a variety of rock types . Most geologically young mountain ranges on the Earth's land surface are associated with either the Pacific Ring of Fire or the Alpide belt . The Pacific Ring of Fire includes the Andes of South America, extends through

280-444: A nearby glen after his daughter Nellie and it is still known as Nellies Glen today. The shale mine operated from 1886 to 1896, until the reserves were exhausted. Shale was mined and taken by a horse-drawn tramway that ran in a tunnel under Narrow Neck . On the other side, it connected with the tramways from nearby coal mines and other oil shale mines at Ruined Castle . The shale then went via an inclined railway at Katoomba . In 1903,

336-620: A shale mine in the Jamison Valley in the 19th century, and other operations were set up in several places. Locations for mining activities included the Jamison Valley , the upper Grose Valley , Newnes , Glen Davis and the Asgard Swamp area outside Mount Victoria . Shale mining failed in the long run because it was not profitable. In 2000, the Greater Blue Mountains Area , a vast area of wilderness in

392-586: A wide and balanced representation of eucalypt habitats from wet and dry sclerophyll, mallee heathlands, as well as localised swamps, wetlands, and grassland. 90 eucalypti tax (13% of the global total) and representation of all four groups of eucalypts occur. There is also a high level of endemism with 114 endemic taxa found in the area as well as 120 nationally rare and threatened plant taxa. The site hosts several evolutionary relic species ( Wollemia , Microstrobos , Acrophyllum ) which have persisted in highly restricted micro sites." The Greater Blue Mountains Area

448-437: Is Gundungurra country. The first record of a European coming to the valley was of Thomas Jones, a natural history specimen collector, who followed the course of Coxs River from Hartley, New South Wales to Burragorang in 1818. The first land was taken up in 1838, by settlers who travelled from Burragorang and Camden, New South Wales . Later in the 19th century, an oil shale mine was operated by one J. B. North. He named

504-806: Is a popular sport in the Blue Mountains, with the Blue Mountains Cattle Dogs representing the district in the Western Zone Premier League, Country Plate and Presidents Cup competitions. At 4 am on 28 January 1931 a cliff face known as "the Dog Face Rock" collapsed into the Jamison Valley in the Blue Mountains. A second collapse from the same cliff face occurred on 2 May 1931. It was reported that "More than 450 incidents resulting in greater than 200 deaths between 1875 and 2021..." have occurred. Every year there are up to 200 people who are lost or injured in

560-538: Is at work while the mountains are being uplifted until the mountains are reduced to low hills and plains. The early Cenozoic uplift of the Rocky Mountains of Colorado provides an example. As the uplift was occurring some 10,000 feet (3,000 m) of mostly Mesozoic sedimentary strata were removed by erosion over the core of the mountain range and spread as sand and clays across the Great Plains to

616-580: Is considered to be part of the western outskirts of the Greater Sydney area. The region borders on Sydney 's main metropolitan area, its foothills starting about 50 kilometres (31 mi) west of centre of the state capital , close to Penrith . The public's understanding of the extent of the Blue Mountains is varied, as it forms only part of an extensive mountainous area associated with the Great Dividing Range . As defined in 1970,

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672-814: Is found in remote and isolated valleys of the Wollemi National Park . The Blue Mountains Range contains smaller mountain ranges: the Bell Range near The Bells Line of Road and north of the Grose River; the Explorer Range, south of the Grose River extending west towards Mount Victoria; the Caley Range, Erskine Range, Mount Hay Range, Paterson Range, and the Woodford Range. The major recorded peaks are: The Blue Mountains are

728-550: Is in turn a part of the larger East Australian Cordillera physiographic division. The main natural disasters to afflict the area are bushfires and severe storms. In recent years the lower mountains have been subjected to a series of bushfires which have caused great loss of property but relatively little loss of life. The upper mountains had not had a major fire for some decades until December 2002 (the Blackheath Glen Fire) and November 2006 when an extensive blaze in

784-772: Is inhabited by over 400 different forms of animals. Among them are rare mammal species like spotted-tailed quoll , the koala , the yellow-bellied glider , and long-nosed potoroo . There are also some rare reptiles, like the Blue Mountain water skink . There are also some dingoes in the area, which form the top predators and hunt for grey kangaroos . The Blue Mountains are a popular destination for rock climbers , mountain bikers and hikers as well as canyoning and other adventure sports. These sports are well catered for by guiding companies and equipment stores located mainly in Katoomba. Popular climbing destinations include

840-471: Is known as Kings Tableland Aboriginal Place and dates back 22,000 years. Arthur Phillip , the first governor of New South Wales, first glimpsed the extent of the Blue Mountains from a ridge at the site of today's Oakhill College, Castle Hill. He named them the Carmarthen Hills, "some forty to sixty miles distant..." and he reckoned that the ground was "most suitable for government stock". This

896-582: Is now the location of Bells Line of Road between Richmond and Bell , and the Coxs River , a tributary of the Nepean River . It could be followed upstream to the open plains of the Kanimbla Valley, the type of country that farmers prize. British settlers initially considered that fertile lands lay beyond the mountains; while in the belief of many convicts China lay beyond. However, there

952-649: Is possible that he had crossed the mountains via the southern aspect at the Coxs River corridor, guided by the Aborigines. Governor Hunter was impressed by Wilson's skills and sent him on an expedition with John Price and others in January 1798. The party crossed the Nepean River and moved southwest towards the present site of Mittagong . There they turned west and found a route along the ridge where today

1008-551: Is the location where Gidley King in 1799 established a prison town for political prisoners from Ireland and Scotland. The first documented use of the name Blue Mountains appears in Captain John Hunter 's account of Phillip's 1789 expedition up the Hawkesbury River. Describing the events of about 5 July, Hunter wrote: "We frequently, in some of the reaches which we passed through this day, saw very near us

1064-551: The Annamite Range . If the definition of a mountain range is stretched to include underwater mountains, then the Ocean Ridge forms the longest continuous mountain system on Earth, with a length of 65,000 kilometres (40,400 mi). The position of mountain ranges influences climate, such as rain or snow. When air masses move up and over mountains, the air cools, producing orographic precipitation (rain or snow). As

1120-591: The Mesozoic period, rivers dumped vast amounts of sand , burying the other sedimentary rocks . By about 1 million years ago during the Pliocene era, the Blue Mountains began to form, carving out deep valleys and steep cliffs , with an elevation of 3,900 feet. Its main distinctive natural feature are the Three Sisters , a formation of triple sandstone peaks scoured by erosion , whose rocks are lit by

1176-848: The North American Cordillera , the Aleutian Range , on through Kamchatka Peninsula , Japan , Taiwan , the Philippines , Papua New Guinea , to New Zealand . The Andes is 7,000 kilometres (4,350 mi) long and is often considered the world's longest mountain system. The Alpide belt stretches 15,000 km across southern Eurasia , from Java in Maritime Southeast Asia to the Iberian Peninsula in Western Europe , including

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1232-611: The Wombeyan Caves Road is located. In the process they found a way to go west of the mountains, by going around them instead of across them. In March of the same year, Wilson and Price ventured to the Camden area, and then continued further south until they encountered Thirlmere Lakes , finally almost reaching the present site of Goulburn . It is possible that the accomplishments of this expedition were suppressed by Hunter, who may not have wanted convicts to know that there

1288-565: The Blue Mountains and surrounding areas. Examples of Aboriginal habitation can be found in many places. In the Red Hands Cave, a rock shelter near Glenbrook , the walls contain hand stencils from adults and children. On the southern side of Queen Elizabeth Drive, at Wentworth Falls , a rocky knoll has a large number of grinding grooves created by rubbing stone implements on the rock to shape and sharpen them. There are also carved images of animal tracks and an occupation cave. The site

1344-499: The Blue Mountains for its exceptional biodiversity, was enlisted by UNESCO and categorized itself as a natural World Heritage Site . On 18 July 2023, a proposal for a naming board in a dual Aboriginal name was discussed by the Geographical Names Board of New South Wales whether the Blue Mountains would be officially named Gulumada. The climate varies with elevation. At Katoomba, (1,010 m or 3,314 ft)

1400-696: The Blue Mountains region is bounded by the Nepean and Hawkesbury rivers in the east, the Coxs River and Lake Burragorang to the west and south, and the Wolgan and Colo rivers to the north. Geologically, it is situated in the central parts of the Sydney Basin . The Blue Mountains Range comprises a range of mountains , plateau escarpments extending off the Great Dividing Range about 4.8 kilometres (3.0 mi) northwest of Wolgan Gap in

1456-606: The Blue Mountains, Kanangra-Boyd, Wollemi, Gardens of Stone, Yengo, Nattai and Thirlmere Lakes National Parks, plus the Jenolan Caves Karst Conservation Reserve. This site was chosen to be included on the World Heritage list because: "Criteria (ii) and (iv): Australia's eucalypt vegetation is worthy of recognition as of outstanding universal value, because of its adaptability and evolution in post-Gondwana isolation. The site contains

1512-530: The Blue mountains. In 2022, two people died and two were injured when they were on a walking track in Wentworth Falls , and were hit by debris from a landslide. Mountain range Mountain ranges are usually segmented by highlands or mountain passes and valleys . Individual mountains within the same mountain range do not necessarily have the same geologic structure or petrology . They may be

1568-594: The Centennial Glen cliffs near Blackheath and Mount Piddington near the town of Mount Victoria . Climbing is currently banned on The Three Sisters. Mountain biking takes place mainly on the many fire trails that branch away from the main spine of the Great Western Highway, such as Narrow Neck, Anderson's Fire Trail and others. Likewise many of the fire trails are popular with day hikers, though many dedicated walking trails exist away from

1624-598: The Grose Valley threatened several communities including Bell and Blackheath (the Lawsons Long Alley Fire). This latest fire burned for almost a month but was extinguished, mainly due to a change in the weather, without loss of human life or property. A program of winter burning seemed to have been successful in reducing fires in the upper mountains. In recent years, the bushfires have become far more destructive and expansive than before. The region

1680-500: The Upper Blue Mountains with many misty days. The predominant natural vegetation of the higher ridges is eucalyptus forest. Heath-like vegetation is present on plateau edges above cliffs. The sheltered gorges often contain temperate rainforests . There are also many hanging swamps with button grass reeds and thick, deep black soil. Wollemia nobilis , the "Wollemi pine", a relict of earlier vegetation of Gondwana ,

1736-476: The abundant eucalyptus trees in the Blue Mountains may cause Mie scattering and thus the blue haze for which the mountains were named. A sandstone plateau dominated by a landscape of eucalyptus forests, the Blue Mountains are located at the top of a 470-million-year-old quartzite . In the Permian period, a shallow sea covered the region, when rivers brought shales , siltstones and mudstones . Then during

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1792-627: The air descends on the leeward side, it warms again (following the adiabatic lapse rate ) and is drier, having been stripped of much of its moisture. Often, a rain shadow will affect the leeward side of a range. As a consequence, large mountain ranges, such as the Andes, compartmentalize continents into distinct climate regions . Mountain ranges are constantly subjected to erosional forces which work to tear them down. The basins adjacent to an eroding mountain range are then filled with sediments that are buried and turned into sedimentary rock . Erosion

1848-476: The blazes may severely reduce the biodiversity of the area and even wipe out some of the threatened species in the area, such as the regent honeyeater . The Greater Blue Mountains Area was unanimously listed as a World Heritage Area by UNESCO on 29 November 2000, becoming the fourth area in New South Wales to be listed. The area totals roughly 10,000 square kilometres (3,900 sq mi), including

1904-504: The coldest air drains into the valleys during calm, clear nights. However, the passing of cold fronts can significantly lower the average temperature during the night and the day. The Blue Mountains is not known for particularly cold mornings compared to other areas on the Central Tablelands, such as Oberon, Bathurst and Orange. There are two to three snowfalls per year. Annual rainfall is about 1,050 millimetres (41 in) in

1960-616: The colony was in the grips of a drought. Evans and his party reached the Fish and Macquarie rivers, and the site of Bathurst . On 7 July 1814, construction of a road across the mountains was begun by William Cox . The work was at the behest of Governor Macquarie. 30 convict labourers and 8 guards completed the road on 14 January 1815 after 27 weeks of hard work. Since the Blue Mountains are rich in coal and shale, mining for these resources began in Hartley Vale in 1865. J.B. North ran

2016-593: The early 2010s, the region's biodiversity and infrastructure has been severely affected by massive bushfires of unprecedented size and impact. In 2018 8.4 million people visited the Blue Mountains. The Blue Mountains and Southern Highlands Basalt Forests is a prominent forest community within the ecoregion. Following European settlement of the Sydney area, the area was named the Carmarthen and Lansdowne Hills by Arthur Phillip in 1788. The Carmarthen Hills were in

2072-485: The east. This mass of rock was removed as the range was actively undergoing uplift. The removal of such a mass from the core of the range most likely caused further uplift as the region adjusted isostatically in response to the removed weight. Rivers are traditionally believed to be the principal cause of mountain range erosion, by cutting into bedrock and transporting sediment. Computer simulation has shown that as mountain belts change from tectonically active to inactive,

2128-511: The fire roads. Canyoning in the Blue Mountains is a popular sport and caters for various skill levels. It carries inherent dangers, yet for those with the appropriate skills or those looking to take a guided trip there are many great opportunities to experience a different view of the Blue Mountains. There are numerous abseiling options available in the Blue Mountains including single and multipitch routes. There are some restrictions though with certain areas being closed for abseiling. Cricket

2184-505: The first successful European crossing. Blaxland set out with Lawson and Wentworth on 11 May 1813 and succeeded in crossing the mountains by 31 May. They ventured as far as to what is now Mount Blaxland , just west of Coxs River . In November 1813, Macquarie sent the surveyor George Evans on an expedition to confirm the apparent discoveries made by Blaxland and his party. He was also told to see if there existed enough arable land to justify settlement. The issue had become more urgent because

2240-825: The glimpse of light at the time of day . The Blue Mountains have been inhabited for millennia by the Gundungurra people , now represented by the Gundungurra Tribal Council Aboriginal Corporation based in Katoomba, and, in the lower Blue Mountains, by the Darug people , now represented by the Darug Tribal Aboriginal Corporation. The Gundungurra creation story of the Blue Mountains tells that Dreaming creatures Mirigan and Garangatch, half fish and half reptile, fought an epic battle which scarred

2296-536: The hills, which we suppose as seen from Port Jackson, and called by the governor the Blue Mountains." During the nineteenth century the name was commonly applied to the portion of the Great Dividing Range from about Goulburn in the south to the Hunter Valley in the north, but in time it came to be associated with a more limited area. The native Aborigines knew two routes across the mountains: Bilpin Ridge, which

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2352-463: The landscape into the Jamison Valley . The Gundungurra Tribal Council is a nonprofit organisation representing the Gundungurra traditional owners , promoting heritage and culture and providing a support for Gundungurra people connecting back to Country. Gundungurra Tribal Council Aboriginal Corporation has a registered Native Title Claim since 1995 over their traditional lands, which include

2408-582: The north of the region and the Lansdowne Hills were in the south. The name Blue Mountains , however, was preferred and is derived from the blue tinge the range takes on when viewed from a distance. The tinge is believed to be caused by Mie scattering which occurs when incoming light with shorter wavelengths is preferentially scattered by particles within the atmosphere imparting a blue-greyish colour to any distant objects, including mountains and clouds. Volatile terpenoids emitted in large quantities by

2464-483: The other side of the river, the trail crosses some ranges before reaching Jenolan Caves Road . It then heads south to finish at Jenolan. 33°44′00″S 150°15′00″E  /  33.73333°S 150.25000°E  / -33.73333; 150.25000 Blue Mountains (Australia) The Blue Mountains are a mountainous region and a mountain range located in New South Wales , Australia . The region

2520-619: The ranges of the Himalayas , Karakoram , Hindu Kush , Alborz , Caucasus , and the Alps . The Himalayas contain the highest mountains in the world, including Mount Everest , which is 8,848 metres (29,029 ft) high. Mountain ranges outside these two systems include the Arctic Cordillera , Appalachians , Great Dividing Range , East Siberians , Altais , Scandinavians , Qinling , Western Ghats , Vindhyas , Byrrangas , and

2576-627: The rate of erosion drops because there are fewer abrasive particles in the water and fewer landslides. Mountains on other planets and natural satellites of the Solar System, including the Moon , are often isolated and formed mainly by processes such as impacts, though there are examples of mountain ranges (or "Montes") somewhat similar to those on Earth. Saturn 's moon Titan and Pluto , in particular, exhibit large mountain ranges in chains composed mainly of ices rather than rock. Examples include

2632-618: The sandstone fortress west of the Nepean. Between 1798 and 1813, many people explored various parts of the mountains, from the Bilpin Ridge to the southern regions, today the site of the Kanangra-Boyd National Park . Still, they did not find a definite route across the mountains. The 1813 crossing of the Blue Mountains by Gregory Blaxland , William Lawson and William Charles Wentworth is officially credited as

2688-547: The summer average maximum temperature is around 22 °C with a few days extending into the 30s (80s–90s °F) although it is quite common to see maximum temperatures stay in the teens when east coast troughs persist. Night-time temperatures are usually in the teens but can drop to single figures at times. During winter, the temperature is typically around 10 to 11 °C in the daytime with −1 °C or so on clear nights and 3 to 4 °C on cloudy nights. Very occasionally it will get down to −3 °C or slightly lower but usually

2744-506: The time which came to light in the late 1980s. Wilson arrived with the First Fleet in 1788 and was freed in 1792. He settled in the bush, living with the Aborigines and even functioning as an intermediary between them and the settlers. In 1797 he returned to Sydney, claiming to have explored up to a hundred miles in all directions around Sydney, including across the mountains. His descriptions and observations were generally accurate, and it

2800-450: The tramway was relaid to allow stockpiled shale to be removed from the old mine site, the last activity at the old mine. There was a village, Megalong, that was associated with the shale mine; it was in ruins by the mid 1930s. Today the valley is still used for farming, but tourism has increased since the historic Six Foot Track was restored. This track was marked out in the 19th century as a bridle trail from Katoomba to Jenolan Caves . It

2856-508: The watershed between Coxs River to the south and the Grose and Wolgan rivers to the north. The range contains the Explorer Range and the Bell Range. Once considered impassable by settlers, the 1813 expedition by Blaxland , Wentworth and Lawson opened up the interior to British settlement. Today, the Blue Mountains area includes the local government area of the City of Blue Mountains . Since

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2912-421: Was a relatively easy way out of Sydney. Wilson was killed by Aborigines after abducting an Aboriginal woman "for his personal use", but he had accomplished much as an explorer. He was never recognised as the first person to cross the mountains, possibly because his Coxs River journey could not be verified, while his route west of Mittagong may have been the "long way around" for a colony that had its eyes fixed on

2968-592: Was called the Six Foot Track because it had to be that wide in order to accommodate two to three riders riding abreast. It fell into disuse eventually but was restored as a walking trail by the Department of Lands in 1984. It begins at the Explorers Tree at Katoomba, goes down through Nellies Glen, passes the site of the former Megalong village, then continues across Megalong Valley to Coxs River. On

3024-476: Was little fear that the mountains might provide a means of escape since they were considered impassable. This idea was, to some extent, convenient for local authorities. An "insurmountable" barrier would deter convicts from trying to escape in that direction. A former convict, John Wilson, may have been the first colonist to cross the Blue Mountains. It is also believed that Matthew Everingham , 1795, may have also been partly successful based on letters he wrote at

3080-525: Was once considered to be the Blue Mountains is Mount Bindo , with an elevation 1,362 m (4,469 ft) AHD . A large part of the Blue Mountains is incorporated into the Greater Blue Mountains Area World Heritage Site , consisting of seven national park areas and a conservation reserve. The Blue Mountains area is a distinct physiographic section of the larger Hunter-Hawkesbury Sunkland province. This

3136-583: Was severely damaged in the 2013 New South Wales bushfires . However, even this was dwarfed by the 2019–20 Australian bushfire season , during which the entire mountain range was devastated at a scale never seen before. According to preliminary reports, up to 80% of the World Heritage Area has burned as of January 2020, many of these being areas that had never burned in any previously observed bushfires. These destructive blazes have been linked to accelerating climate change . There have been fears that

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