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Mourne Mountains Area , N: Croob Subarea
Feature count in area: 58, all in Down, OSI/LPS Maps: 20, 29, EW-CLY
Highest Place: Slieve Donard 849m

Starting Places (33) in area Mourne Mountains:
Alex Steddom Tree, Aughrim Airstrip, Ben Crom Dam, Bloody Bridge Car Park, Carlingford Greenway, Carrick Little, Crocknafeola Wood, Crotlieve Mountain, Donard Car Park Newcastle, Drummanmore Picnic, Fofanny Reservoir, Forest Office CP, Gamekeepers Lodge CP, Happy Valley Trassey Rd, Hen Mountain CP, Leitrim Lodge CP, Mayo Road Corner, Meelmore Lodge, Newcastle Harbour, Ott CP, Red Bog Road, Rourkes Park, Sandy Brae, Silent Valley Reservoir Head Rd, Slieve Donard Trail Head, Slieve Foye Viewing Point, Slievefoy Forest CP, Spelga Dam E, Spelga Dam N, Spelga Dam S, Trassey Car Park, Two Mile River CP, Yellow Water Park

Summits & other features in area Mourne Mountains:
Cen: Loughshannagh: Ben Crom 526m, Carn Mountain 585.2m, Carn Mountain North Top 553.7m, Doan 592.6m, Ott Mountain 526.8m, Slieve Loughshannagh 617m, Slieve Muck 670.4m, Slievenaglogh 445m
E: Binnian: Slieve Binnian 745.9m, Slieve Binnian East Top 639m, Slieve Binnian North Top 678m, Slieve Binnian North Tor 682.5m, Wee Binnian 460m
E: Donard: Chimney Rock Mountain 656m, Crossone 540m, Millstone Mountain 460m, Rocky Mountain 524m, Slieve Donard 849m
E: Lamagan: Cove Mountain 654.8m, Slieve Beg 595.9m, Slievelamagan 702.2m
N: Bearnagh: Slieve Bearnagh 739m, Slieve Bearnagh North Tor 680m, Slieve Meelbeg 701.9m, Slieve Meelmore 687m
N: Castlewellan: Slievenalargy 280m, Slievenaslat 272m
N: Commedagh: Slieve Commedagh 767m, Slieve Corragh 641.9m, Slievenaglogh 584.4m, Slievenaglogh East Top 571m
N: Croob: Cratlieve 429m, Slieve Croob 534m, Slievegarran 391m, Slievenisky 446m
N: Rathfriland: Knockiveagh 235m
S: Kilkeel: Knockchree 306m
S: Rostrevor: Crenville 460m, Finlieve 578m, Slievemartin 485m, Slievemeel 420m, Slievemeen 472m
W: Hilltown: Gruggandoo 382m, Slieveacarnane 296m
W: Slievemoughanmore: Crotlieve Mountain 347m, Eagle Mountain 638m, Rocky Mountain 404m, Shanlieve 626m, Slievemoughanmore 560m, Tievedockaragh 473m, Wee Slievemoughan 428m
W: Spelga: Butter Mountain 500m, Cock Mountain 504m, Cock Mountain South-West Top 505m, Hen Mountain 354m, Pigeon Rock Mountain 534m, Pigeon Rock Mountain South Top 530m, Slievenamiskan 444m

Note: this list of places may include island features such as summits, but not islands as such.
Rating graphic.
Slievenisky, 446m Hill Sliabh an Uisce A name in Irish,
Place Rating ..
, Down County in Ulster province, in Carn Lists, Slievenisky is the 749th highest place in Ireland.
Grid Reference J32415 44345, OS 1:50k mapsheet 20
Place visited by: 78 members, recently by: Paddym99, garybuz, childminder05, Oscar-mckinney, daftgrandad, PPruzina, Colin Murphy, Jai-mckinney, Kirsty, Carolyn105, dregish, abcd, Pikes, Andy1287, jlk
I visited this place: NO (You need to be a logged-in member for this.)
Longitude: -5.964511, Latitude: 54.331281, Easting: 332415, Northing: 344345, Prominence: 41m,  Isolation: 1.1km
ITM: 732384 844418
Bedrock type: Appinite suite, (Newry Granodiorite Complex)

  Short or GPS IDs, 6 char: Slvnsk, 10 char: Slvnsky

Gallery for Slievenisky (Sliabh an Uisce) and surrounds
Summary for Slievenisky (Sliabh an Uisce): Rough spur off Slieve Croob
Summary created by simon3 2013-03-17 10:38:55
   picture about Slievenisky (<em>Sliabh an Uisce</em>)
Picture: Two tops, rough ground and south Down views.
Slievenisky can be reached easily enough from the access for Slieve Croob such as the amenity parking at A (J30015 45240). The land between the amenity area and the summit is rough, sometimes boggy and tricky navigationally in mist but walkable for the experienced. Of the two spurs of Slieve Croob this top is the wilder. It has good views of the coast and the northern Mournes.
The top has two rivals for the highest ground. As of 2013 MV is showing the highest point of the larger area shown on the OS map as 446m high.
Member Comments for Slievenisky (Sliabh an Uisce)
Comment create / edit display placeholder

   picture about Slievenisky (<em>Sliabh an Uisce</em>)
Picture: The summit area of Slievenisky
csd on Slievenisky
by csd 6 Jul 2008
I tackled Slievenisky form Slieve Croob, which is only 1.2km away and there's a handy service road up from the car park. There's a handy fence that makes navigation straightforward, even in low visibility. Climb over the fence and follow it SE to near the summit of Slievenisky, before turning right near the top. The summit area is on a prominent bump; you can't miss it. Again, low cloud limited the views. Linkback:
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   picture about Slievenisky (<em>Sliabh an Uisce</em>)
Croob loop
by Carolyn105 22 Nov 2020
Done this in a loop with slieve croob, slivenagarren, and cratlieve. Clear day and it is not a problem to do a loop. We parked at slieve croob car park Linkback:
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   picture about Slievenisky (<em>Sliabh an Uisce</em>)
Picture: The summit from SW slope of Slieve Croob
Simple enough via its neighbour
by Colin Murphy 19 Jul 2021
Followed the paved road up Slieve Croob and from there the narrow track (located very close to the trig pillar) SE that leads most of the way to Slievenisky's summit, which is a slightly elevated area of peat with good views looking down into the valley to the west. Linkback:
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   picture about Slievenisky (<em>Sliabh an Uisce</em>)
The Most Direct Route
by Trailtrekker 3 May 2013
Like Cratlieve, the other spur off Slieve Croob, this peak seems to only be walked by those who have taken in it's bigger neighbour first. And the numbers suggest that only about a quarter of MVers do this. For those who just want to take in this summit, for whatever reason, here it is. There is a wooden gate at B (J31905 43624) just east of a small river. Enter the field and follow farmers track parallel to the river until you reach another gate at C (J31902 43897). Go through the gate, there is a fence to your right which you can follow to the summit.

As you can see from the attached photo I walked this hill during the recent snow. My approach was from Slieve Croob and used the above route as the most direct route of getting off the open mountainside and on to a road (as I was in a rush to get back to Castlewellan in time to see the Grand National!). Not the conditions to really judge it, but I would wager that the terrain under foot is better from this approach than the boggy saddle between Slieve Croob. So if you have already done Croob and have decided to return to the area to also tick this and Cratlieve off your list I would highly recommend this route.

On an aside, isn't it amazing how a fall of snow can make what would not be the most exciting of hill walks into a greater adventure. On both Cratlieve and the small Grungadoo I came across five feet frozen drifts that allowed me to walk over the gates. Definitely a lot of fun to be had in the snow. The only regret I had was that I hadn't brought a small sledge for the descent, particularly on my visit to Doan last weekend! I do love the Mournes and the recent snow has only made me love them more. Linkback:
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British summit data courtesy:
Database of British & Irish Hills