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The Ulster Marilyns

Summits in Ulster with at least 150m prominence
A Marilyn is a summit in the UK or Ireland of any height with a topographical prominence of at least 150 metres. This page focuses on Marilyns in the province of Ulster as originally listed by the late E.D. ‘Clem’ Clements. The Ulster Marilyn sub-list currently comprises 139 summits.
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The Ulster Marilyns is one of the first two dedicated hill lists ever to be published that focus on summits in the province. The other list is the Ulster Hewitts. These lists were originally published right here on The Ireland Walking Guide website on 14th February 2024.

Since E.D. ‘Clem’ Clements’ death a Legacy Committee has been formed to safeguard all his hill related documents, which also include his hill lists, with the co-custodian responsibility for the Irish Marilyns now being with Myrddyn Phillips and David Purchase.

We would like to thank Myrddyn and David for agreeing the inclusion of Clem's list on The Ireland Walking Guide website and for supporting the creation of this hillwalking challenge.

Mountain and hill summits offer great walking opportunities all year round, however we particularly recommend visiting them during months when the days are longest. For this reason, we promote upland walking as our monthly theme for June.

#JuneUplandWalk

Ulster map
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​Each marker on the map represents the location of a Marilyn summit in Ulster. Click on a marker for further information about that location. All the summit locations marked on this map have also been listed in height order below.

Listed by height
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Summit name Elevation Irish Grid Reference Upland area
Slieve Donard 850m J:358:277 Mourne Mountains
Slieve Commedagh 765m J:346:286 Mourne Mountains
Errigal Mountain 751m B:928:208 Derryveagh Mountains
Slieve Binnian 746m J:320:234 Mourne Mountains
Slieve Bearnagh 739m J:313:280 Mourne Mountains
Slievelamagan 702m J:329:260 Mourne Mountains
Slieve Meelbeg 702m J:301:279 Mourne Mountains
Sawel Mountain 678m H:618:973 Sperrin Mountains
Slieve Snaght 678m G:923:148 Derryveagh Mountains
Croaghgorm 674m G:948:896 Bluestack Mountains
Lavagh More 671m G:935:910 Bluestack Mountains
Slieve Muck 670m J:281:250 Mourne Mountains
Muckish 666m C:004:287 Derryveagh Mountains
Cuilcagh 665m H:124:280 Cuilcagh Hills
Dooish 652m B:982:210 Derryveagh Mountains
Eagle Mountain 638m J:244:230 Mourne Mountains
Mullaghclogha 635m H:557:957 Sperrin Mountains
Mullaghaneany 627m H:685:986 Sperrin Mountains
Slieve Snaght 615m C:424:390 Central Inishowen Hills
Aghla Beg 602m B:965:246 Derryveagh Mountains
Silver Hill 600m G:906:913 Bluestack Mountains
Slieve League 595m G:544:784 Southwest Donegal Hills
Aghla Mountain 593m G:896:988 Bluestack Mountains
Slieve Gullion 573m J:025:203 Slieve Gullion Hills
Croaghnageer 569m H:011:886 Bluestack Mountains
Gaugin Mountain 565m G:983:949 Bluestack Mountains
Carnanelly 562m H:674:921 Sperrin Mountains
Slievemoughanmore 559m J:249:240 Mourne Mountains
Mackoght 555m B:940:214 Derryveagh Mountains
Trostan 550m D:180:236 Antrim Hills
Mullaghmore 550m C:738:008 Sperrin Mountains
The Playbank 543m H:032:256 Iron Mountains
Mullaghcarn 542m H:510:809 Sperrin Mountains
Moylenanav 539m B:956:133 Glendowan Mountains
Slieve Croob 534m J:319:454 Dromara Hills
Slieve Gallion 527m H:798:878 Sperrin Mountains
Croaghconnellagh 523m H:023:863 Bluestack Mountains
Carnaween 521m G:876:891 Bluestack Mountains
Crocknafarragh 517m B:877:167 Derryveagh Mountains
Knocklayd 514m D:115:363 Antrim Hills
Slievetooey 511m G:628:899 Southwest Donegal Hills
Slieveanorra 508m D:134:266 Antrim Hills
Raghtin More 502m C:339:456 Urris Hills
Common Mountain 500m G:709:859 Southwest Donegal Hills
Bulbin 494m C:357:422 West Inishowen Hills
Crownarad 493m G:676:786 Southwest Donegal Hills
Slievemartin 485m J:201:176 Mourne Mountains
Scalp Mountain 484m C:406:271 Central Inishowen Hills
Mullaghash 480m C:640:019 Sperrin Mountains
Divis 478m J:281:755 Belfast Hills
Croveenananta 476m G:941:947 Bluestack Mountains
Agnew's Hill 474m D:328:017 Antrim Hills
Crocknalaragagh 471m B:984:261 Derryveagh Mountains
Loughsalt Mountain 469m C:133:265 West Milford Hills
Benbradagh 465m C:722:113 Sperrin Mountains
Barnesmore 451m H:037:854 Barnesmore Hills
Slievenaglogh 445m J:299:230 Mourne Mountains
Mid Hill 444m D:202:157 Antrim Hills
Leahanmore 442m C:017:166 Glendowan Mountains
Slemish 438m D:221:053 Antrim Hills
Tievealehid 429m B:873:262 Gweedore Hills
Boultypatrick 429m G:967:980 Bluestack Mountains
Scraigs 428m B:934:013 Bluestack Mountains
Leahan 427m G:517:802 Southwest Donegal Hills
Camlough Mountain 423m J:049:253 Cooley Mountains
Farscallop 421m B:993:170 Glendowan Mountains
Bessy Bell 420m H:390:820 Standalone summit
Urris Hills 417m C:307:418 Urris Hills
Curraghchosaly Mountain 416m H:478:839 Sperrin Mountains
Owenreagh Hill 407m H:420:959 Sperrin Mountains
Slieve Rushen 404m H:234:226 Standalone summit
Balix Hill 403m H:475:962 Sperrin Mountains
Donald's Hill 399m C:743:173 Sperrin Mountains
Belmore Mountain 398m H:138:418 West Fermanagh Hills
Loughermore 396m C:589:156 Sperrin Mountains
Tullybrack 386m H:090:458 West Fermanagh Hills
Croaghleheen 385m B:879:033 Croaghleheen Hills
Binevenagh 385m C:691:301 Sperrin Mountains
Gruggandoo 382m J:200:255 Mourne Mountains
Craignamaddy 382m H:522:894 Sperrin Mountains
Oughtmore 382m H:724:837 Sperrin Mountains
Slieve Beagh 380m H:524:436 Slieve Beagh Hills
Croaghacullion 374m G:570:869 Southwest Donegal Hills
Grinlieve 371m C:489:384 Central Inishowen Hills
Slievekirk 370m C:451:082 Sperrin Mountains
Culliagh Southeast Top 369m C:082:020 South Letterkenny Hills
Carrigatuke 365m H:904:321 Slieve Gullion Hills
Altnapaste 364m H:045:959 Bluestack Mountains
Knockalla Mountain 363m C:236:343 East Milford Hills
Crockkinnagoe 363m H:124:724 Barnesmore Hills
Gartan Mountain 357m C:050:207 Glendowan Mountains
Craigcannon 357m C:244:302 East Milford Hills
Big Collin 353m J:232:966 Antrim Hills
Mulmosog Mountain 351m G:741:867 Southwest Donegal Hills
Crockmore 349m C:101:259 West Milford Hills
Bolaght Mountain 345m H:259:765 Barnesmore Hills
Dooish 341m H:315:698 Barnesmore Hills
Loughanleagh 339m N:722:959 North Midland Hills
Gregory Hill 336m C:116:124 North Letterkenny Hills
Crocknamoghil 335m H:578:851 Sperrin Mountains
Derkbeg Hill 332m G:829:988 Croaghleheen Hills
Crocknasmug 328m C:658:439 East Inishowen Hills
Crockdooish 321m C:529:024 Sperrin Mountains
Slieve Glah 320m H:462:008 North Midland Hills
Carnearny 319m J:176:927 Antrim Hills
Brougher Mountain 317m H:349:528 Brougher Hills
Crovehy 315m B:827:114 Derryveagh Mountains
Cnoc Fola 314m B:833:322 Gweedore Hills
Slievemore 314m H:593:615 Sperrin Mountains
Carn Hill 312m J:347:891 Carrickfergus Hills
Mouldy Hill 312m C:354:288 Central Inishowen Hills
Croslieve 308m J:002:164 Slieve Gullion Hills
Knockchree 306m J:271:170 Mourne Mountains
Pollnalaght 298m H:369:701 Barnesmore Hills
Coolcross Hill 291m C:404:469 Central Inishowen Hills
Stragraddy Mountain 285m C:082:245 West Milford Hills
Mongorry Hill 284m C:242:050 South Letterkenny Hills
Crockalough 282m C:461:568 Malin Head Hills
Slievenalargy 280m J:297:355 Dromara Hills
Croaghleconnell 266m B:841:057 Derryveagh Mountains
Dooish Mountain 266m C:300:107 South Letterkenny Hills
Tievecrom 263m J:023:153 Slieve Gullion Hills
Holywell Hill 260m C:385:171 Holywell Hills
Bruse Hill 260m N:317:981 Standalone summit
Croaghnamaddy 252m C:029:402 Horn Head Hills
Binnion 250m C:369:489 Central Inishowen Hills
Croaghegly 245m B:736:073 Crohy Head Hills
Mullaghcroy 242m H:329:818 Standalone summit
Dunaff Hill 232m C:308:486 Standalone summit
Cluidaniller West Top 227m B:654:158 Arranmore Island Hills
Murren Hill 227m C:215:424 Fanad Head Hills
Inch Top 222m C:313:253 Island summit
Clondermot Hill 221m C:434:127 Sperrin Mountains
Gortmonly Hill 218m C:396:080 Sperrin Mountains
Cairngaver 217m J:454:766 Craigantlet Hills
Croaghan Hill 217m H:299:974 South Letterkenny Hills
Ganiamore 207m C:111:400 Standalone summit
Cross Slieve 206m D:236:295 Antrim Hills
Crocknasleigh 163m C:123:429 Standalone summit

The Ulster Marilyns

  • ​​Slieve Donard (850m)
  • Slieve Commedagh (765m)
  • Errigal Mountain (751m)
  • Slieve Binnian (746m)
  • Slieve Bearnagh (739m)
  • Slievelamagan (702m)
  • Slieve Meelbeg (702m)
  • Sawel Mountain (678m)
  • Slieve Snaght (678m)
  • Croaghgorm (674m)
  • Lavagh More (671m)
  • Slieve Muck (670m)
  • Muckish (666m)
  • Cuilcagh (665m)
  • Dooish (652m)
  • Eagle Mountain (638m)
  • Mullaghclogha (635m)
  • Mullaghaneany (627m)
  • Slieve Snaght (615m)
  • Aghla Beg (602m)
  • Silver Hill (600m)
  • Slieve League (595m)
  • Aghla Mountain (593m)
  • Slieve Gullion (573m)
  • Croaghnageer (569m)
  • Gaugin Mountain (565m)
  • Carnanelly (562m)
  • Slievemoughanmore (559m)
  • Mackoght (555m)
  • Trostan (550m)
  • Mullaghmore (550m)
  • The Playbank (543m)
  • Mullaghcarn (542m)
  • Moylenanav (539m)
  • Slieve Croob (534m)
  • Slieve Gallion (527m)
  • Croaghconnellagh (523m)
  • Carnaween (521m)
  • Crocknafarragh (517m)
  • Knocklayd (514m)
  • Slievetooey (511m)
  • Slieveanorra (508m)
  • Raghtin More (502m)
  • Common Mountain (500m)
  • Bulbin (494m)
  • Crownarad (493m)
  • Slievemartin (485m)
  • Scalp Mountain (484m)
  • Mullaghash (480m)
  • Divis (478m)
  • Croveenananta (476m)
  • Agnew's Hill (474m)
  • Crocknalaragagh (471m)
  • Loughsalt Mountain (469m)
  • Benbradagh (465m)
  • Barnesmore (451m)
  • Slievenaglogh (445m)
  • Mid Hill (444m)
  • Leahanmore (442m)
  • Slemish (438m)
  • Tievealehid (429m)
  • Boultypatrick (429m)
  • Scraigs (428m)
  • Leahan (427m)
  • Camlough Mountain (423m)
  • Farscallop (421m)
  • Bessy Bell (420m)
  • Urris Hills (417m)
  • Curraghchosaly Mountain (416m)
  • Owenreagh Hill (407m)
  • Slieve Rushen (404m)
  • Balix Hill (403m)
  • Donald's Hill (399m)
  • Belmore Mountain (398m)
  • Loughermore (396m)
  • Tullybrack (386m)
  • Croaghleheen (385m)
  • Binevenagh (385m)
  • Gruggandoo (382m)
  • Craignamaddy (382m)
  • Oughtmore (382m)
  • Slieve Beagh (380m)
  • Croaghacullion (374m)
  • Grinlieve (371m)
  • Slievekirk (370m)
  • Culliagh Southeast Top (369m)
  • Carrigatuke (365m)
  • Altnapaste (364m)
  • Knockalla Mountain (363m)
  • Crockkinnagoe (363m)
  • Gartan Mountain (357m)
  • Craigcannon (357m)
  • Big Collin (353m)
  • Mulmosog Mountain (351m)
  • Crockmore (349m)
  • Bolaght Mountain (345m)
  • Dooish (341m)
  • Loughanleagh (339m)
  • Gregory Hill (336m)
  • Crocknamoghil (335m)
  • Derkbeg Hill (332m)
  • Crocknasmug (328m)
  • Crockdooish (321m)
  • Slieve Glah (320m)
  • Carnearny (319m)
  • Brougher Mountain (317m)
  • Crovehy (315m)
  • Cnoc Fola (314m)
  • Slievemore (314m)
  • Carn Hill (312m)
  • Mouldy Hill (312m)
  • Croslieve (308m)
  • Knockchree (306m)
  • Pollnalaght (298m)
  • Coolcross Hill (291m)
  • Stragraddy Mountain (285m)
  • Mongorry Hill (284m)
  • Crockalough (282m)
  • Slievenalargy (280m)
  • Croaghleconnell (266m)
  • Dooish Mountain (266m)
  • Tievecrom (263m)
  • Holywell Hill (260m)
  • Bruse Hill (260m)
  • Croaghnamaddy (252m)
  • Binnion (250m)
  • Croaghegly (245m)
  • Mullaghcroy (242m)
  • Dunaff Hill (232m)
  • Cluidaniller West Top (227m)
  • Murren Hill (227m)
  • Inch Top (222m)
  • Clondermot Hill (221m)
  • Gortmonly Hill (218m)
  • Cairngaver (217m)
  • Croaghan Hill (217m)
  • Ganiamore (207m)
  • Cross Slieve (206m)
  • Crocknasleigh (163m)

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