Lists of mountains in Ireland
Height Rank Prom . Rank Name Range/Area Province County Height ( m ) Prom . ( m ) Height ( ft ) Prom . ( ft ) Isolation ( m ) Topo Map OSI/OSNI Grid
1 1 Carrauntoohil MacGillycuddy 's Reeks Munster Kerry 1,039 1,039 3,407 3,407 400 78 V804844
2 144 Beenkeragh MacGillycuddy 's Reeks Munster Kerry 1,008 91 3,308 298 600 78 V801852
3 136 Caher MacGillycuddy 's Reeks Munster Kerry 1,000 100 3,281 327 300 78 V793839
4 73 Cnoc na Péiste MacGillycuddy 's Reeks Munster Kerry 988 253 3,241 830 500 78 V836842
5 238 Caher West Top MacGillycuddy 's Reeks Munster Kerry 973 24 3,194 79 300 78 V790840
6 204 Maolán Buí MacGillycuddy 's Reeks Munster Kerry 973 38 3,192 125 500 78 V832838
7 183 Cnoc an Chuillinn MacGillycuddy 's Reeks Munster Kerry 958 53 3,143 174 500 78 V823833
8 207 Na Cnámha MacGillycuddy 's Reeks Munster Kerry 957 37 3,138 122 400 78 V801847
9 2 Brandon Brandon Group Munster Kerry 952 934 3,122 3,064 600 70 Q460116
10 158 The Big Gun MacGillycuddy 's Reeks Munster Kerry 939 74 3,081 243 300 78 V840845
11 217 Cruach Mhór MacGillycuddy 's Reeks Munster Kerry 932 34 3,058 112 300 78 V841848
12 253 Cnoc an Chuillinn East Top MacGillycuddy 's Reeks Munster Kerry 926 21 3,038 69 500 78 V828834
13 3 Lugnaquilla Wicklow Mountains Leinster Wicklow 925 905 3,035 2,969 1,700 56 T032917
14 4 Galtymore Galty Mountains Munster Limerick / Tipperary 918 898 3,011 2,946 1,000 74 R878238
15 243 Brandon North Top Brandon Group Munster Kerry 895 23 2,938 76 400 70 Q461125
16 222 Knockbrinnea ( W ) MacGillycuddy 's Reeks Munster Kerry 854 29 2,802 95 300 78 V807858
17 244 Stumpa Bharr na hAbhann MacGillycuddy 's Reeks Munster Kerry 852 23 2,796 76 500 78 V797858
18 20 Baurtregaum Slieve Mish Munster Kerry 851 643 2,792 2,110 700 71 Q749076
19 5 Slieve Donard Mourne Mountains Munster Down 850 822 2,789 2,697 1,000 29 J357277
20 50 Mullaghcleevaun Wicklow Mountains Leinster Wicklow 849 374 2,785 1,227 1,500 56 O068070
List of 273 Irish Vandeleur-Lynams
See also : List of Nuttall mountains in England and Wales ( height above 600 m , prominence over 15 m ) On 3 October 2018 , English Lake District climber , James Forrest , completed all 273 Irish Vandeleur-Lynams in 8 weeks . [ 46 ]
These are lists of mountains and mountain ranges in Ireland. Those within Northern Ireland, or on the 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 (or relative height, or drop, or re-ascent), used to classify the mountain (e.g. the change in elevation required between neighbouring mountains), is noted. In British definitions, a height of is required for a mountain, whereas in Ireland, a lower threshold of is sometimes advocated. The lowest minimum prominence threshold of any definition of an Irish mountain is (e.g. the Vandeleur-Lynam), however most definitions, including the UIAA criteria, do not consider prominences below as being mountains (e.g. must at least be an Arderin or a Hewitt). Many British definitions consider a peak with a prominence below , as being a top, and not a mountain (e.g. must be a Marilyn). A popular definition of an Irish mountain requires a minimum prominence of (e.g. a HuMP), and is the basis for the 100 Highest Irish Mountains.