Lists of mountains in Ireland

Many British definitions consider a peak with a prominence below 150 metres (492 ft), as being a top, and not a mountain (e.g. must be a Marilyn).

[24] MountainViews was created in 2002 by Simon Stewart as a non–profit online database for climbers in Ireland to document and catalogue their Irish climbs.

[21] Collins Press published the MountainView Online Datase in 2013 in the book: A Guide to Ireland's Mountain Summits: The Vandeleur-Lynams & the Arderins.

[8] Regardless, the range contains ten of the thirteen Scottish Furths in Ireland, and given its importance, and as an important example of complexity of mountain classification, the ten highest Reeks are listed below: (any height, prominence over 100 m) This is the MountainViews[i] 100 Highest Irish Mountains list,[8] which was published by Collins Press in the 2013 book: A Guide to Ireland's Mountain Summits: The Vandeleur-Lynams & the Arderins.

[40] The list requires a prominence of over 100 m (328 ft), a compromise between the popular British Isles Marilyn criteria of 150 metres (see List of Marilyns in the British Isles for a ranking of Irish Marilyns by height and by prominence), and the Simms–Hewitt–Arderins criteria of 30 metres (see List of mountains of the British Isles by height for a ranking of Irish Simms by height and by prominence).

[9] In 2023, the MountainView Online Database listed 409 Irish mountains as meeting the Arderin definition.

[43] (height above 600 m, prominence over 15 m) The broadest noted definition of an Irish mountain over 600 m (1,969 ft) is the Vandeleur-Lynam list, as it only requires a prominence of 15 m (49 ft), and is the Irish fully metric equivalent of the England & Wales Nuttall.

[9][44] In 2023, the MountainView Online Database lists 275 Irish mountains as meeting the Vandeleur-Lynam definition.

[q] On 3 October 2018, English Lake District climber, James Forrest, completed all 273 Irish Vandeleur-Lynams in 8 weeks.

[46] This record was in turn broken in 2024 by Kerryman Sean Clifford who scaled all 275 peaks in 21 days, 2 hours, and 46 minutes.

[50][49] There are 4 Irish Provincial Tops, namely: Carrauntoohil, in Munster, Lugnaquilla in Leinster, Slieve Donard, in Ulster, and Mweelrea in Connacht.