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- 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. A height above 2,000 ft, or more latterly 610 m, is considered necessary to be classified as a mountain – as opposed to a hill – in the British Isles. With the exception of Munros, all the lists require a prominence above 15 metres (49.21 ft). A prominence of between 15 and 30 metres (49.21 and 98.43 ft) (e.g. some Nuttalls and Vandeleur-Lynams), does not meet the International Climbing and Mountaineering Federation (UIAA) definition of an "independent peak", which is a threshold over 30 metres (98 ft). Most lists consider a prominence between 30 and 150 metres (98.43 and 492.1 ft) as a "top" (e.g. many Hewitts and Simms). Marilyns, meanwhile, have a prominence above 150 metres (492.1 ft), with no additional height threshold. They range from small 150-metre (490 ft) hills to the largest mountains. Prominences above 600 metres (1,969 ft), meet the P600 (the "Majors") classification, which is the UIAA international classification of a "major" mountain. (en)
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