Highest mountains in Great Britain ("Simms" classification) | |
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Highest point | |
Elevation | over 600 m (1,969 ft) |
Prominence | over 30 m (98 ft) |
Geography | |
Location |
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This article provides access to lists of mountains in Britain and Ireland by height and by prominence. (See Lists of mountains below.) Height and prominence are the most important metrics for the classifications of mountains by the UIAA; with isolation a distant third criterion. [lower-alpha 2] [2] The list is sourced from the Database of British and Irish Hills ("DoBIH") [lower-alpha 3] for peaks that meet the consensus height threshold for a mountain, namely 600 metres (1,969 ft); the list also rules out peaks with a prominence below 30 metres (98 ft) and thus, the list is therefore precisely a list of the 2,756 [lower-alpha 4] Simms in the British Isles (as at October 2022). [3] [4] Many classifications of mountains in the British Isles consider a prominence between 30–150 metres (98–492 ft) as being a "top", and not a mountain; however, using the 30 metres (98 ft) prominence threshold gives the broadest possible list of mountains. For a ranking of mountains with a higher prominence threshold use:
Despite using the lower threshold for prominence of 30 metres (98 ft), the UIAA threshold for an "independent" peak, [2] one Scottish Munro is missing, namely Maoile Lunndaidh whose official prominence changed to 11 metres (36 ft) in 2014; [lower-alpha 5] [lower-alpha 6] As of October 2018 [update] , the list of 2,754 British Isles Simms contained:
This list was downloaded from the DoBIH in October 2018, and includes all British and Irish peaks with a prominence below 30 metres (98 ft). [lower-alpha 3] Note that topographical prominence is complex to measure and requires a survey of the entire contours of a peak, rather than a single point of height. [8] These tables are therefore subject to being revised over time, and should not be amended or updated unless the entire DoBIH data is re-downloaded again. The default table ranking is by height, so where the table is sorted by for example Region, the table will list the mountains within each Region by order of height.
The DoBIH uses the following codes for the various classifications of mountains and hills in the British Isles, which many of the above peaks also fall into: [9] [10]
suffixes:
= twin
As of 31 December 2023, 7,654 people had climbed all 282 Scottish Munros, [11] as of April 2020 eleven people had climbed all 1556 Marilyns of Great Britain, [lower-alpha 8] [12] while as of October 2022 only five people had climbed all the 2532 Simms of Great Britain, [lower-alpha 9] Ken Whyte (Cruachan Beag 21/09/2010), Iain Thow (Cut Hill 07/06/2015), Michael Earnshaw (Cruach Fhiarach 16/07/2019), Rob Woodall (Sgurr Dhonuill West Top 28/06/2021) and Anne Bunn (Torr Ceum na Caillich, 24/09/2022). The first three have also climbed the Irish Simms, so including all the Simms of the British Isles. [13]
In these lists of mountains in Ireland, those within Northern Ireland, or on the Republic of Ireland – United Kingdom border, are marked with an asterisk, while the rest are within the Republic of Ireland. Where mountains are ranked by height, the definition of the topographical prominence used to classify the mountain, is noted. In British definitions, a height of 600 metres (1,969 ft) is required for a mountain, whereas in Ireland, a lower threshold of 500 metres (1,640 ft) is sometimes advocated.
The mountains and hills of the British Isles are categorised into various lists based on different combinations of elevation, prominence, and other criteria such as isolation. These lists are used for peak bagging, whereby hillwalkers attempt to reach all the summits on a given list, the oldest being the 282 Munros in Scotland, created in 1891.
Cnoc na Péiste, anglicised Knocknapeasta, at 988 metres (3,241 ft), is the fourth-highest peak in Ireland, on the Arderin and Vandeleur-Lynam lists. Cnoc na Péiste is part of the MacGillycuddy's Reeks range in County Kerry. It is one of only two 3,000 ft peaks in the Reeks with a prominence above the Marilyn threshold of 150 metres, and is the highest summit of the Eastern Reeks. In 1943, a USAAF plane crashed into the mountain, killing all five crew, and parts of the wreckage can still be seen in Lough Cummeenapeasta.
The list of distinct Scottish peaks of 3000ft (914.4m) and over, of "sufficient separation" from their neighbouring peaks. The list that was originally drawn up by Sir H.T. Munro in the Scottish Mountaineering Club Journal in 1891 was unfinished at the time of his death. Munro did not write down a precise definition of what he meant by "sufficient separation", though the character of a mountain did enter into it. Through regular use these hills have become known as the Munros.
The Simms: A Simm is a hill in England, Wales or Scotland over 600m high with a drop of at least 30 metres all-round. Simm is an acronym for Six-hundred Metre Mountain. The Irish and Isle of Man Simms are also listed on this website. A Subsimm is a hill which just fails (by up to 10m) to qualify on the drop rule, i.e. over 600m with 20–29m drop.
Creag Toll a'Choin was never officially a twin but turned out to be 0.35m higher than Maoile Lunndaidh. This was a surprise, as some OS maps show Maoile Lunndaidh to be 2m higher, so a second survey was carried out to confirm the finding.
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The SMC holds a record of Munros, Corbetts, Grahams and Donalds compleators.
A Simm is a hill in Britain that is at least 600 metres high and has a drop of at least 30 metres on all sides. Anyone with at least 2000 Simms is eligible for the Simm Hall of Fame. As this is a distant target for many baggers, the Simm Corridor is open to those who have climbed at least 1500 Simms.