P600 (hill)
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This is a list of P600 mountains in Britain and Ireland by height. A P600 is defined as a mountain with a
topographic prominence In topography, prominence or relative height (also referred to as autonomous height, and shoulder drop in US English, and drop in British English) measures the height of a mountain or hill's summit relative to the lowest contour line encircling ...
above , regardless of
elevation The elevation of a geographic location (geography), ''location'' is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational equipotenti ...
or any other merits (e.g.
topographic isolation The topographic isolation of a summit is the minimum geographical distance, horizontal distance to a point of equal elevation, representing a radius of dominance in which the peak is the highest point. It can be calculated for small hills and is ...
); this is a similar approach to that of the Marilyn, Simms, HuMP and TuMP British Isle mountain and hill classifications. By definition, P600s have a height above , the requirement to be called a "mountain" in the British Isles. The "P" terminology is an international classification, along with P1500
Ultras Ultras are a type of association football fans who are known for their fanatical support. The term originated in Italy, but is used worldwide to describe predominantly organised fans of association football teams. The behavioural tendency ...
. P600 and "Majors" are used interchangeably. , there were 120 P600s in the British Isles: 81 in Scotland, 25 in Ireland, 8 in Wales, 4 in England, 1 in Northern Ireland, and 1 in the Isle of Man. The 120 P600s contained 54 of the 282 Scottish Munros, and 10 of the 34 Non-Scottish Munros (or
Furths This is a list of Furth mountains in Britain and Ireland by height. Lists of mountains and hills in the British Isles#Furths, Furths are defined as mountains that meet the Lists of mountains and hills in the British Isles#Munros, classification c ...
), all of which have heights above , and are sometimes called the "Super-Majors". The list also contained the highest mountains in Scotland, Wales, Ireland, and England. On 9 November 2019,
Norfolk Norfolk ( ) is a Ceremonial counties of England, ceremonial county in England, located in East Anglia and officially part of the East of England region. It borders Lincolnshire and The Wash to the north-west, the North Sea to the north and eas ...
climber Liam Chase became the first person to complete all 120 P600s in a single calendar year, starting with
Cross Fell Cross Fell is the highest mountain in the Pennines of Northern England and the highest point in England outside the Lake District. It is located in the North Pennines Area of Outstanding Natural Beauty. It lies within the county of Cumbria and ...
on 1 January, and ending with
Pen y Fan Pen y Fan () is the highest peak in South Wales, situated in Brecon Beacons National Park (Bannau Brycheiniog). At above sea-level, it is also the highest British peak south of Cadair Idris in Snowdonia. It is the highest point (List of countie ...
. Chase was also only the seventh person recorded to have climbed all P600s over any time period.


P600 mountains by height

British Isles mountain cartographer, Alan Dawson, developer of the Marilyns designation, labelled "Majors" as having a prominence of over , but no other criteria. Dawson's ''prominence threshold'' was the normal ''height threshold'' for a British Isles mountain, and 111 mountains met his definition. In 2004, Dawson's prominence was converted into a metric threshold of by Rob Woodall & Jonathan de Ferranti, and labelled the "P600s", a term used by the
UIAA The International Climbing and Mountaineering Federation, commonly known by its French name Union internationale des associations d'alpinisme (UIAA; ), was founded in August 1932 in Chamonix, France when 20 mountaineering associations met for ...
for major mountains; the P600s expanded to 119 mountains. The current list has 120 mountains, although there is dispute as to whether Moel Siabod's prominence is above 600 metres (2,000 ft), or is in fact just below the threshold at 599.9 metres. This list below was downloaded from the ''
Database of British and Irish Hills 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 ...
'' ("DoBIH") in October 2018. Note that topographical prominence, unlike topographical elevation, is far more complex to measure and requires a survey of the entire contours of a peak, rather than a single point of height. 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. (‡) Would not have been eligible for Dawson's 2004 "imperial" list of 111 mountains with prominence over .
(‡‡) Added since the 2006 "metric" list of 119 mountains with prominence over , based on updated surveys.


Sub–Majors by height

In 2006, mountain database publisher, Mark Trengove, added a list of seven "Sub–Majors" (to Dawson, Woodall, and de Ferranti's P600 "Majors"), which had a prominence of between , and which possibly could become P600s, or Majors, in the future due to any possible discovered "contour uncertainty, rounding error, or map error". Since 2006, one of Trengrove's Sub–Majors,
Moel Siabod with unknown meaning of 'Siabod') is a mountain in Snowdonia, Wales, which sits isolated above the village of Dolwyddelan. At , it is the highest peak in the Moelwynion mountain range. The UK National Mountain Centre, Plas-y-Brenin, is located ...
, was re–surveyed and shown to be a P600 "Major". The list below is the October 2018 DoBIH list of the six mountains with a prominence between in the British Isles.


DoBIH codes

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: Prefixes
*s sub *x deleted Suffixes
*= twin


See also

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List of mountains of the British Isles by height 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 ...
*
Lists of mountains and hills in the British Isles The mountains and hills of the British Isles are categorised into various lists based on different combinations of elevation, topographic prominence, prominence, and other criteria such as topographic isolation, isolation. These lists are used f ...
*
List of mountains in Ireland A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, but ...
*
List of Munro mountains in Scotland This is a list of Munro mountains and Munro Tops in Scotland by height. Lists of mountains and hills in the British Isles#Munros, Munros are defined as Scottish mountains over in height, and which are on the Scottish Mountaineering Club ("SMC") ...
*
List of Murdos (mountains) This is a list of Murdo mountains in Scotland by height. Lists of mountains and hills in the British Isles#Murdos, Murdos are defined as Scottish mountains over in height and with a prominence over ; a mix of imperial measures, imperial and met ...
*
List of Furth mountains in the British Isles This is a list of Furth mountains in Britain and Ireland by height. Furths are defined as mountains that meet the classification criteria to be a Scottish Munro, including being over in elevation, but which are ''furth'' of (i.e. "outside" of) ...
*
List of Marilyns in the British Isles This is a list of Marilyn hills and mountains in the United Kingdom, Republic of Ireland, Ireland and surrounding islands and Stack (geology), sea stacks. Lists of mountains and hills in the British Isles#Marilyns, Marilyns are defined as peaks w ...


Notes


References


General sources

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External links


The Database of British and Irish Hills (DoBIH)
the largest database of mountains and hills in the British Isles
Hill Bagging UK & Ireland
the searchable interface for the DoBIH

pre the revision of Moel Siabod to P600 status
The P600s: The 119 Major Mountains of Britain and Ireland
pre the revision of Moel Siabod to P600 status
The 119 The P600m Peaks in the British Isles
pre the revision of Moel Siabod to P600 status {{DEFAULTSORT:List of P600 mountains in the British Isles P600