Brian Boru's Fort : Ring Fort

Grid RefR 696 743
GPSR 69618 74281 (7m)
Longitude8° 27' 2.5" W
Latitude52° 49' 7.33" N
ITM east480366
ITM north584435
Nearest TownKillaloe (1.5 Km)
OS Sheet58
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 16th October 2005

The whole of this area is associated with Brian Boru. Every B&B seems to be named after him or something to do with him. Just north of Killaloe a small signpost points the way up a long tree-shrouded track to the site of Brian Boru's fort - a large ring fort of fairly huge proportions.

The ditch suurounding the 4m high bank is up to 2m deep making it appear very impressive. The inner sanctum is around 40m in diameter, but the small forrest that is growing on it makes it difficult to judge. The entrance to the site is situated in the north bank and I suggest you walk around the outside of the fort and enter it from here for a much more dramatic feel. Somehow just walking up the bank seems a little bit lame.

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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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