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Donegal SW Area   N: Sliabh Tuaidh Subarea
Place count in area: 24, OSI/LPS Maps: 10 
Highest place:
Slieve League, 596.4m
Maximum height for area: 596.4 metres,     Maximum prominence for area: 470 metres,

Note: this list of places includes island features such as summits, but not islands as such.
Rating graphic.
Crockuna Hill Cnoc Onna A name in Irish (Ir. Cnoc Onna [OSI†], 'hill of Onna') Donegal County in Ulster Province, in Carn List, Flaggy quartzite and dark schist Bedrock

Height: 400m OS 1:50k Mapsheet: 10 Grid Reference: G62860 88040
Place visited by 29 members. Recently by: eamonoc, annem, LorraineG60, noucamp, melohara, MichaelG55, paulbrown, Fergalh, hgboyle, shaunkelly, groe, Wilderness, simoburn, chalky, Garmin
I have visited this place: NO (You need to be a logged-in member to change this.)

Longitude: -8.577357, Latitude: 54.738928 , Easting: 162860, Northing: 388040 Prominence: 115m,  Isolation: 1.9km
ITM: 562819 888029,   GPS IDs, 6 char: Crckn, 10 char: Crockuna
Bedrock type: Flaggy quartzite and dark schist, (Slieve League Formation)

The Irish form Cnoc Onna can be inferred from Lag Onna on the Discovery map.   Cnoc Onna is the 951st highest place in Ireland.

COMMENTS for Crockuna (Cnoc Onna) 1 of 1  
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In footsteps of St Colmcille .. by gerrym   (Show all for Crockuna (Cnoc Onna)) Picture about mountain Crockuna (<i>Cnoc Onna</i>) in area Donegal SW, Ireland
Picture: Crockuna from Sli Cholmcille
Crockuna via the Sli Cholmcille
by noucamp  2 Sep 2020
Parking available at G 640 887 starA near McMonigle Stoneworks.
Walk SW to G 63975 88685 starB to access Sli Cholmcille and follow Sli Cholmcille to a stile at G630 886 starC. The Yellow Man waymarker posts are not too plentiful but provided it's not very misty it should be possible to see and pick out the route as it ascends the flank of Crockuna. After crossing the stile at G630 886 starC Sli Cholmcille begins to descend at around G628 884 starD, 360m so head directly uphill (South) to the summit. If you are fortunate to have good visibility, you will be able to see as far south as Ben Bulben and the Ox Mountains. Views North are also impressive. Round trip of 4 kms with 220m ascent. Linkback:
Your Score: Very useful <<  >>Average
(End of comment section for Crockuna (Cnoc Onna).)

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Some mapping:
Open Street Map
(Various variations used.)
British summit data courtesy:
Database of British & Irish Hills
(Creative Commons Licence), a Hill-walking Website for the island of Ireland. 2300 Summiteers, 1460 Contributors, Newsletter since 2007