'Croaghaun Mountain' : Passage Tomb

TownlandGlen
CountySligo
Grid RefG 635 275
GPSG 63488 27517
Longitude8° 33' 34.09" W
Latitude54° 11' 42.79" N
ITM east480366
ITM north584435
Nearest TownBallysadare (3.6 Km)
OS Sheet25
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 2nd November 2008

The climb to the summit of this conical peak in the Ox Mountains isn't too bad if you start from the farm to the south. The last part of it is quite steep, but not too long. The top of the mountain is just 30m x 25m and on this tiny area someone decided to build a passage tomb. This tomb has the distinction of yeilding the oldest ever radio carbon date in Europe for such a structure at around 4500 bce.

The remains of the tomb are not very impressive. It was of an undifferentiated design, which means that the chamber was just a widening of the passage. There are three stones on the south side, two at the rear and one on the north side. In the heather there is a low sill stone.

As well as having orthostatic walls the passage and chamber are sunk into a rock-cut trench in the mountain top. Building this monument involved a lot of work.

The views from up here are simply stunning. Even on a cloudy, winter's day you can see so much: Knocknarea to the north, Knocknashee to the southwest and Carrowkeel & Kesh to the south east. Beyond Knocknarea would be King's Mountain and Bunbulben, but they were hidden in clouds while I was up here.

I usually visit a site, take a good look at it and move on to the next. Not today. I sat ato this lonely peak for 3 hours! What a great place.

Like this monument

Marked Sites

Random Gazetteer

A Selection of Other Passage Tombs

About Coordinates Displayed

This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.

Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.

Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.

The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.

UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.

ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.

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