; Slievenaglogh 445m hill, Mourne Mountains Ireland at MountainViews.ie
Cookies. This website uses cookies, which are small text files that the website puts on your computer to facilitate operation. Cookies help us provide a better service to you. They are used to track general user traffic information and to help the website function properly.

Click to hide this notice for 30 days.
Welcome to MountainViews
If you want to use the website often please enrol (quick and free) at top right.
Zoom: ??
For more map options click on any overview map area or any detail map feature.
Find Suggested Walks
Find hill, mountain, island, coastal feature.

Recent Contributions
Get Notifications

Burren: Ballyvaghan Woods Loop

Binn Shleibhe: Perfectly located between two lakes.

Ballycurragh Hill: Forestry thinned to the north of summit

Burren: Black Head Ramble

Ballinacor Mountain: Track marked on OS is no more

Gibbs Island

Stob Mhic Mhartuin: A mountain well worth a visit

Near Knocknarea, Ox Mountains (Ireland)

Knockatee: Small but Perfectly Formed. Excellent Views for the Effort.

Glencullen Hiking

Knockatee: Small hill with stories and a massive view.

Recognition for the Arderins

Conditions and Info
Use of MountainViews is governed by conditions and a privacy policy.
Read general information about the site.
Opinions in material here are not necessarily endorsed by MountainViews.
Hillwalking is a risk sport. Information in comments, walks or shared GPS tracks may not be accurate for example as regards safety or access permission. You are responsible for your safety and your permission to walk.
See the credits and list definitions.
Video display
Mourne Mountains Area
Rating graphic.
Slievenaglogh Hill Sliabh na gCloch A name in Irish
Down County in NI and in Ulster Province, in Carn List, Granite granophyre Bedrock

Height: 445m OS 1:50k Mapsheet: 29 Grid Reference: J29879 23017
Place visited by 126 members. Recently by: BogRunner1, Colin Murphy, ceadeile, Fenton, Andy1287, abcd, Niamhq, dshields, arderincorbett, jlk, trostanite, shaygo, PPruz, bryanjbarry, Xiom5724
I have visited this place: NO (You need to be a logged-in member to change this.)

Longitude: -6.013536, Latitude: 54.139786 , Easting: 329879, Northing: 323017 Prominence: 160m,  Isolation: 1.9km
ITM: 729795 823020,   GPS IDs, 6 char: Slv445, 10 char: Slvnglg445
Bedrock type: Granite granophyre, (Mourne Mountains granite)

This is the lower of two peaks in the Mourne Mountains called Slievenaglogh, the other being situated further north near Hare's Gap. This Slievenaglogh overlooks the Silent Valley Reservoir, constructed in the 1920s to supply water for Belfast. Before it was flooded, the Silent Valley was known as the 'Happy Valley'. Labourers from the Happy Valley constructed the Mourne Wall for the Belfast and District Water Commissioners to delimit the catchment area. It is 2-2.5m high and 1m thick, encloses 9,000 acres of land (3,600 hectares) and passes over the summit of many of Mourne's highest peaks.   Slievenaglogh is the 748th highest place in Ireland.

Linkback: https://mountainviews.ie/summit/635/
COMMENTS for Slievenaglogh 1 2 Next page >>  
Follow this place's comments
Walls prove an excellent navigation aid. .. by group   (Show all for Slievenaglogh)
MountainViews.ie Picture about mountain Slievenaglogh in area Mourne Mountains, Ireland
Picture: View along Silent Valley towards Ben Crom Reservoir. Shrouded Slieve Binnian to the right.
wicklore on Slievenaglogh, 2009
by wicklore  16 Nov 2009
Similar to paulocon I headed up Slievenaglogh from the Silent Valley Reservoir car park. At the west side of the reservoir there is a track shown on the map leading up to a mini quarry and pond. Along this track there is a pole with the orienteering symbol of red and white triangles forming a square. At this pole I left the main track and followed a muddy and wet trail until it brought me up to the Mourne Wall. I hadnt read paulocons sage advice about keeping to the wall, and after following it for a while I struck out across open bog towards the slopes of Slievenaglogh.

This was a mistake as the ground really is very wet , and my feet disappeared underwater in many places when I thought I was stepping onto firm grass or heather. I wasted a lot of time criss-crossing the bog to find a way across. When I eventually reached the slope of Slievenaglogh I scaled a tributary wall and then the main Mourne Wall itself. From this height looking back down into the bog I could see just how wet it was as water glistened everywhere.

The haul up to the summit alongside the wall is steep and in places large jumbles of rock need to be skirted. If climbing on the left hand side of the wall, a stile at the top gives access over the wall to gain the small summit cairn. From the summit fabulous views can be had of the Silent Valley up to the Ben Crom Reservoir. The odd stump of Wee Binnian is just across the reservoir to the east, and the views back over the bog to the south give a great sense of isolation.

I followed the Mourne Wall back down but branched off to the right at some stone shelters to keep out of the bog. In fact the wall ceases for a few hundred metres as it crosses the flat bog, no doubt because of the saturated ground. By branching off at the stone shelters I followed an old track that parallels the wall from a safe (and dry) distance. On reaching another wall I turned left and followed it until it joined the Mourne Wall and the ramble back to the Silent Valley Reservoir. As paulocon suggests, the straightforward and drier option is to use the Mourne Wall and its subsidiaries to navigate this wet bog on the way up and back, rather than taking the shorter route across the innocent looking bog.

This walk took me 3 hours return, which was longer than I expected. However it was a nice handy walk overall, and it offered new views and perspectives on the wider Mourne mountains around. Linkback: https://mountainviews.ie/summit/635/comment/4272/
Your Score: Very useful <<  >>Average
A nuisance to be encountered .. by paulocon   (Show all for Slievenaglogh)
There's a small car park at the bottom of the Ban .. by csd   (Show all for Slievenaglogh)
The Silent Valley Reservoir park is a great place .. by wicklore   (Show all for Slievenaglogh)
Climbed from Silent Valley as part of a walk alon .. by paulocon   (Show all for Slievenaglogh)
COMMENTS for Slievenaglogh 1 2 Next page >>
(End of comment section for Slievenaglogh.)

OSi logo OSNI/LPS logo
Some mapping:
Open Street Map
(Various variations used.)
British summit data courtesy:
Database of British & Irish Hills
(Creative Commons Licence)
MountainViews.ie, a Hill-walking Website for the island of Ireland. 2100 Summiteers, 1300 Contributors, Monthly Newsletter since 2007