Glassamucky Brakes : Stone Circle

Grid RefO 115 209
Longitude6° 19' 48.83" W
Latitude53° 13' 36.51" N
ITM east480366
ITM north584435
Nearest TownTallaght (6.9 Km)
OS Sheet50
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 19th May 2002

A stone circle in County Dublin? Oh indeed! Underneath the peat and heather there may be a second within 100m of this one.

The circle really took me by surprise. Again I was expecting a cairn kerb but I got a stone circle. Only half of it remains visible but I think the rest may be beneath the peat which seems to have slid down from above.

Again the location of this 10m diameter circle is superb on a small shelf that looks due west across the valley towards the many peaks and troughs of Ballymorfin Hill.

On the west side of the circle 7 stones still stand and a further two tall, possiby south west facing entrance stones, lie fallen outside of the circle.

Of the stones that are still standing the tallest is around 90cm tall. As this site is possibly Dublin's only remaining stone circle and it is just 60m from a road I'd say it's well worth a visit.

Click Thumbnail to View Full Size Image


Sunday, 21st July 2002

Well spotted Anthony! This circle would seem to be an axial stone circle. I hadn't noticed that the one stone to the north west was significantly wider than the others.

It might be half missing but it just keeps getting better.

Click Thumbnail to View Full Size Image


Like this monument

Marked Sites


Take the R115 south from Rockbrook and after about 4km you will pass a turn off to the right. Keep going past the parking area on the left. As you round a bend you will see a memorial in 100m in front of you to the left. Just past this memorial is a left turn. Turn here and take this road until you pass another left turn. Park shortly after the junction. You will see a cattle crossing sign in front of you. Walk 30m along the road beyond this and head directly up the hill. The circle is about 50m in.

Random Gazetteer

A Selection of Other Stone Circles

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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