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 isolation a distant third criterion. The list is sourced from the Database of British and Irish Hills ("DoBIH") for peaks that meet the consensus height threshold for a mountain, namely 600 m; the list also rules out peaks with a prominence below 30 m and thus, the list is therefore precisely a list of the 2,756 Simms in the British Isles (as at October 2022). Many classifications of mountains in the British Isles consider a prominence between 30-150 m as being a "top", and not a mountain; however, using the 30 m prominence threshold gives the broadest possible list of mountains. For a ranking of mountains with a higher prominence threshold use:
 * List of Marilyns in the British Isles, for ranking by height and by prominence, of peaks with prominence over 150 m; or
 * List of P600 mountains in the British Isles, for ranking by height and by prominence, of peaks with prominence over 600 m

Coverage of Simms
Despite using the lower threshold for prominence of 30 m, the UIAA threshold for an "independent" peak, one Scottish Munro is missing, namely Maoile Lunndaidh whose official prominence changed to 11 m in 2014;, the list of 2,754 British Isles Simms contained: 1. 281 of the 282 Munros, and 158 of the 226 Munro Tops;

2. All 222 Corbetts, all 219 Grahams, and all 118 Scottish New Donalds;

3. 872 of the 2,011 British Isles Marilyns;

4. All 524 of the England, Wales, and Ireland Hewitts;

5. 117 of the 541 Lake District Birketts (of which 99 are Wainwrights), that meet the Simms criteria;

6. All 224 of the 407 Irish Arderins with a height above 600.0 m;

7. All of the 120 P600 ("major") mountains in the British Isles;

8. 33 of the 34 England, Wales and Ireland Furths.

Simms by height by prominence
This list was downloaded from the DoBIH in October 2018, and includes all British and Irish peaks with a prominence below 30 m. 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. 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.

{{legend|#ff0|Regional Top: The highest mountain in England, Wales, Scotland, Ireland, or the Isle of Man}}

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: • Ma	Marilyn

• Hu	HuMP

• Sim	Simm

• 5	Dodd

• M	Munro

• MT	Munro Top

• F	Furth

• C	Corbett

• G	Graham

• D	Donald

• DT	Donald Top

• Hew	Hewitt

• N	Nuttall

• Dew	Dewey

• DDew	Donald Dewey

• HF	Highland Five

• 4	400-499m Tump

• 3	300-399m Tump (GB)

• 2	200-299m Tump (GB)

• 1	100-199m Tump (GB)

• 0	0-99m Tump (GB)

• W	Wainwright

• WO	Wainwright Outlying Fell

• B	Birkett

• Sy	Synge

• Fel	Fellranger

• CoH	County Top – Historic (pre-1974)

• CoA	County Top – Administrative (1974 to mid-1990s)

• CoU	County Top – Current County or Unitary Authority

• CoL	County Top – Current London Borough

• SIB	Significant Island of Britain

• Dil	Dillon

• A	Arderin

• VL	Vandeleur-Lynam

• O	Other list (which includes):

• * Bin Binnion

• * Bg Bridge

• * BL Buxton & Lewis

• * Ca Carn

• * CT Corbett Top

• * GT Graham Top

• * Mur Murdo

• * P500 P500

• * P600 P600

• Un	unclassified

prefixes:

s	sub

x	deleted

suffixes:

= 	twin

People who have climbed all hills in a group
As of 31 December 2021, 7,098 people had climbed all 282 Scottish Munros, as of April 2020 eleven people had climbed all 1556 Marilyns of Great Britain, while as of October 2022 only five people had climbed all the 2532 Simms of Great Britain, 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.