Ringfort (Rath), Castlehill, Co. Mayo

Co. Mayo |

Ringforts

Ringfort (Rath), Castlehill, Co. Mayo

A modern post-and-wire fence cuts straight through the middle of this ringfort on a ridge in Castlehill, bisecting what was once a single enclosed space into two halves of working farmland.

That detail alone says something about the fate of many such monuments in the Irish countryside. A rath, to use the Irish term, is an early medieval enclosed settlement, typically circular, defined by one or more earthen banks and ditches. This one sits in ordinary pasture on a northwest to southeast ridge, its banks low and worn but still legible in the landscape.

The enclosure measures roughly 35 metres across and is defined by an earth and stone bank, now only about 0.4 metres high both inside and out, and 2.6 metres wide. Much of the bank on the southwest to north arc has been levelled further to little more than a slight rise in the ground. What is particularly interesting is the relationship between the rath and a field wall that once ran around it. A 1922 Ordnance Survey map shows a stone wall fully encircling the monument, sitting about 2 metres outside the bank and following its curve precisely. By the time the site was examined more recently, the western half of that wall had been removed, leaving only the northeastern arc intact. Whether the wall was built deliberately to preserve the rath, to make use of its shape, or simply out of practical convenience in defining a field boundary is not recorded.

Inside the enclosure, in the southeastern quadrant, there is a slightly raised, stony area roughly 6 metres across in both directions, arranged in an L-shape and defined on two sides by a faint scarp. Its purpose is genuinely unknown. It could represent the remains of a structure, a later use of the space, or something else entirely. That ambiguity is not a failure of observation; it reflects how much of what happened inside these enclosures has simply not survived in any readable form.

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Pete F
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