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Ascending the Knockbrinneas from the north.

Knockbrinnea West Top: Larger Twin

Knockaunanattin West Top: Views, loughs and a navigational aid.

Knockaunanattin West Top: First step to Stumpa Duloigh

Knockaunanattin West Top: Impressive defile start leads to airy ridgeline.

Long Island: No sign of the Great Gatsby

Carran NE Top: Approach via wind farm tracks

Walk on tracks above Glendalough

Lobawn Loop - Clockwise avoids any steep ascent! Easy stream crossing.

Knockree: Reasonably clear path to summit

Circumnavigation of Tawny Rower

Little Sugar Loaf: Windy at the top

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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.
Tormore Island North Hill An Tor Mór Thuaidh A name in Irish Ir. An Tor Mór [logainm.ie], 'the great tor' Donegal County in Ulster Province, in Binnion, Irish Islands Lists, Hornblendic and sometimes schistose Bedrock

Reachable "On Foot " Y
Height: 139m OS 1:50k Mapsheet: 10 Grid Reference: G55500 90800
Place visited by 1 members. Recently by: IainMiller
Island visited by 2 members.
I have visited this place: NO (You need to be a logged-in member to change this.)   I have visited this island: NO (You need to be a logged-in member to change this.)

Longitude: -8.692068, Latitude: 54.763138 , Easting: 155500, Northing: 390800 Prominence: 139m,  Isolation: 0.2km
ITM: 555459 890791,   GPS IDs, 6 char: TrmrIs, 10 char: TrmrIslndN
Bedrock type: Hornblendic and sometimes schistose, (Metadolerite)

An Tor Mór Thuaidh is the 1483th highest place in Ireland. An Tor Mór Thuaidh is the most northerly summit in the Donegal SW area.

Linkback: https://mountainviews.ie/summit/1359/
COMMENTS for Tormore Island North (An Tor Mór Thuaidh) 1 of 1  
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MountainViews.ie Picture about mountain Tormore Island North (<i>An Tor Mór Thuaidh</i>) in area Donegal SW, Ireland
Picture: View from the Summit of Tormore
 
Tormore Island, Ireland's highest sea stack
by IainMiller  5 Jan 2017
Tormore Island is a gigantic leviathan, a sentinel of the deep standing guard at the nautical gates to the Slievetooey coastline. At 148m at it's highest point above the ocean it is Ireland's highest sea stack. This huge square topped stack can be seen for many kilometres along the coast either side of it. It can even be clearly seen from the Dungloe/Kincaslough road some 40KM to the north.
This boy has been climbed twice, once in 2009 and again in 2014.
More information here, http://uniqueascent.ie/sp/directory/details/tormore-island
A film of the second ascent and the view from the summit, https://www.youtube.com/watch?v=8o6_TTj_8jA Linkback: https://mountainviews.ie/summit/1359/comment/18712/
Your Score: Very useful <<  >>Average
 
(End of comment section for Tormore Island North (An Tor Mór Thuaidh).)

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Some mapping:
Open Street Map
(Various variations used.)
British summit data courtesy:
Database of British & Irish Hills
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MountainViews.ie, a Hill-walking Website for the island of Ireland. 2400 Summiteers, 1480 Contributors, maintainer of lists: Arderins, Vandeleur-Lynams, Highest Hundred, County Highpoints etc