This was a stop that I hadn't planned, but I saw I was passing and thought 'why not?' The motte is about 4m tall and one of the largest I have seen, probably 40m in diameter.
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Follow the N2 north from Ashbourne and take the first left after the junction with the R152 (about 3km north). After a little over 1km take the left fork and then turn left at the t-junction. After just 30m there is a lane to the right. The motte is straight in front of you at this junction.
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.