Overview
Castle Kevin isn’t a castle you can walk into. The stone building was already a ruin when the Ordnance Survey mapped it in the 1830s, and what survives is the earthwork beneath it: a broad square motte ringed by a deep, flat-bottomed ditch, on a low east-west ridge 1.3km southeast of Annamoe. It is one of only four Anglo-Norman masonry castles ever built in County Wicklow, which is the quickest way to grasp the place – the Normans built in stone all over Ireland, but here, on the edge of the mountains, they rarely got the chance.
A Norman outpost
Anglo-Normans threw up the motte and bailey around 1200 to push their control into the Wicklow uplands and hold a line against the O’Byrnes and O’Tooles. For a while it was more than a fort. In 1225 the Archbishop of Dublin was granted a weekly market here, so this quiet ridge was briefly a small centre of trade, roughly eight hundred years ago.
It never really took. Geophysical and LiDAR surveys suggest the site was never occupied for long stretches; medieval famine and war drove rents to nothing, and the settlement may have huddled inside the castle walls rather than spreading around them. Tradition has Piers Gaveston, Edward II’s favourite, refortifying the place in 1308 during his campaigns against the local clans, and later accounts have it passing to the O’Tooles and being destroyed before 1636 – though the hard archaeological evidence for those episodes is thin.
The earthwork is the real thing to read on the ground. The motte is recorded at roughly 70m north to south and 46m east to west, its rubble-faced sides rising six or seven metres above a ditch six to eight metres wide. A bailey runs east along the ridge, though the natural fall of the land makes its edge hard to trace. The Frizell family later held Castlekevin into the late 1800s and left private papers, now in the Wicklow County Archives – a window onto the landlord class that farmed here long after the Normans were gone.
The Castlekevin Project
For years the earthworks vanished under bramble and scrub. In 2021 the Roundwood and District Historical, Folklore and Archaeological Society flew a drone over the site and saw how fast it was being reclaimed. Two grants from the Community Monuments Fund followed, paying for the aerial LiDAR and geophysical surveys that stripped the overgrowth back on screen and mapped the full motte and bailey. The most interesting result: LiDAR picked up faint linear boundaries west of the motte, the trace of a wider settlement you would never spot on the ground. The society’s work on the project won the county award at the National Heritage Week Awards, and the grants also funded a podcast series, made with the Irish History Podcast, that follows the survey.
Visiting the ruin
Free, unstaffed, open whenever you can get there. Pull in sensibly by the Annamoe turn-off and follow the footpath up the ridge; it is ten to fifteen minutes over uneven, often boggy ground, so wear boots rather than trainers.
Be honest with yourself about what you are coming to see. There is no visitor centre, no signage yet and no standing walls – just the shape of a Norman fort in the grass and a genuinely good view over the marshy valley it was built to watch. If earthworks and the story behind them leave you cold, Glendalough is twenty minutes away and gives you more to look at. If they don’t, this is one of the quietest medieval sites in the county and you will most likely have it to yourself. Take your litter home; there are no bins.
Conservation
The site has been under a preservation order since 1940. A conservation plan sets out the work ahead: managing the vegetation so roots stop damaging the earthworks, consolidating the surviving tower fragments, and adding interpretive signage, with a second LiDAR survey planned for when the winter growth dies back.
That timing is worth borrowing. Come in late autumn or winter, when the bracken is down and the shape of the motte and ditch reads clearly – it is exactly why the surveyors go back then too.