This is a list of P600 mountains in Britain and Ireland by height. A P600 is defined as a mountain with a topographic prominence above 600 m (1,969 ft), regardless of elevation or any other merits (e.g. topographic isolation); 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 600 m (1,969 ft), the requirement to be called a "mountain" in the British Isles. The "P" terminology is an international classification,[1][2] along with P1500 Ultras.[3][4] P600 and "Majors" are used interchangeably.[5][6][7]
As of October 2018[update], 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), all of which have heights above 3,000 feet (914.4 m), 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 climber Liam Chase became the first person to complete all 120 P600s in a single calendar year, starting with Cross Fell on 1 January, and ending with Pen y Fan.[8] Chase was also only the seventh person recorded to have climbed all P600s over any time period.[8][9]
P600 mountains by height
British Isles mountain cartographer, Alan Dawson, developer of the Marilyns designation,[a][10] labelled "Majors" as having a prominence of over 2,000 ft (610 m), but no other criteria. Dawson's prominence threshold was the normal height threshold for a British Isles mountain,[11] and 111 mountains met his definition.[11] In 2004, Dawson's prominence was converted into a metric threshold of 600 metres (1,969 ft) by Rob Woodall & Jonathan de Ferranti, and labelled the "P600s", a term used by the UIAA for major mountains; the P600s expanded to 119 mountains.[11][12] 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.[12]
This list below was downloaded from the Database of British and Irish Hills ("DoBIH")[b] 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.[15] 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.
Munro: Height over 3,000 feet (914 m), and on the SMC Munro list ("M" § DoBIH codes).
Furth: Height over 3,000 feet (914 m), and on the SMC Furth list ("F" § DoBIH codes).
County: Highest mountain in the county ("CoU" § DoBIH codes).
Country/Regional Top: Highest mountain in England, Wales, Scotland, Ireland, Northern Ireland, or the Isle of Man
British Isles P600 (or "Major") mountains, ranked by height (DoBIH, October 2018)
(‡) Would not have been eligible for Dawson's 2004 "imperial" list of 111 mountains with prominence over 2,000 ft (610 m).
(‡‡) Added since the 2006 "metric" list of 119 mountains with prominence over 2,000 ft (610 m), 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 590–600 m (1,940–1,970 ft), and which possibly could become P600s, or Majors, in the future due to any possible discovered "contour uncertainty, rounding error, or map error".[11][12] Since 2006, one of Trengrove's Sub–Majors, Moel Siabod, was re–surveyed and shown to be a P600 "Major". The list below is the October 2018 DoBIH[b] list of the six mountains with a prominence between 590–600 m (1,940–1,970 ft) in the British Isles.
Munro: Height over 3,000 feet (914 m), and on the SMC Munro list.
Furth: Height over 3,000 feet (914 m), and on the SMC Furth list.
County Top: Highest mountain in the County ("CoU" § DoBIH codes).
British Isles P600 "Sub-Major" mountains, ranked by height (DoBIH, October 2018)
^Marilyns are the same as P600s, except the prominence requirement is just 150 metres (492 ft), therefore all P600s are Marilyns.
^ abThe Database of British and Irish Hills ("DoBIH") is the most referenced database for the classification of peaks in the British Isles,[13] and the DoBIH is licensed under a "Creative Commons Attribution 3.0 Unported License".[14]
References
^Rob Woodhall (May 2016). "Relative hills on Earth". The Relative Hills of Britain (rhb.org.uk). Major: peaks with a minimum prominence of 600m. I believe the term was also coined by [American mountaineer] Steve Fry. There are 95 in Britain. Hall of Fame entry minimum is 150. [..] P600s are more the domain of continent dwellers.
^Jim Bloomer (May 2010). "A certain ratio". The Relative Hills of Britain (rhb.org.uk).
^"Beyond Britain". Relative Hills of Britain. In Britain the main thresholds for relative height (prominence) listings are 150m, 100m and 30m. Worldwide the thresholds for prominence are larger, typically 1500m, 600m and 150m. These may be referred to as Ultras or P1500s, Majors or P600s and Marilyns or P150s.
^"Background to the lists". Database of British and Irish Hills. 2 August 2018. An early U.S. led initiative was to list hills worldwide with a drop of at least 2000ft (609.6m). Although a register of baggers' totals is maintained by Andy Martin, the prominence criterion has been superseded by 600m or 500m in countries outside the US. Hills having a drop of at least 600m or 500m can be obtained by a search on drop, or by a sort in the Excel version, and both lists are offered on Hill Bagging. Internationally, 1500m drop has become the accepted standard for the most prominent mountains and the category is known as the Ultras.
^Alan Dawson (2013). "(2013 Revision) The Relative Hills of Britain". There have been numerous hill lists produced since this book was first published in 1992. Some have found their way into print, others are available online in a central database or as separate downloadable files. This brief bibliography concentrates on the more important lists and sources that are now readily available for those interested. The glossary below may assist in understanding the titles and content of some references.
^"P600 MAP". MountainsofScotland. 2018. A list of British and Irish hills with at least 600m of prominence, also known as the Major Mountains of Britain & Ireland. There are also 25 hills located in Ireland with 600m prominence. These are not displayed on the above map as OS maps do not cover Ireland.
^"The P600 Peaks". HillBagging.co.uk. 2018. The map and list depict the P600m Peaks - a list of British and Irish hills with at least 600m of prominence, also known as the Major Mountains of Britain & Ireland. One of the hills, Rois-Bheinn, could be substituted by Beinn Odhar Bheag - both have a height of 882m, so you could assign to either the 774m prominence and both should be climbed.
^ abcdAlan Dawson; Rob Woodall; Jonathan de Ferranti (2006). "THE BRITISH ISLES COMBINED LIST FOR THE UNITED KINGDOM AND REPUBLIC OF IRELAND". Previously available lists used a cutoff of 2,000 feet (609.6 meters). The 2000 foot cutoff would result in a total of 111 mountains -- 90 for Great Britain, 1 for Isle of Man, and 20 for Ireland. By lowering the cutoff to 600 meters (in order to be consistent with upcoming lists for Europe), we now reach a total of 119 mountains, including 93 for Great Britain, 1 on Man, and 25 in Ireland.
^"Copyright". Database of British and Irish Hills. 3 August 2018. We place no restrictions on use of the data by third parties and encourage authors of other websites and applications to do so. We just ask users to observe the terms of the Creative Commons licence
