This is where Sir Cahir O’Doherty chose to plan his 1608 rebellion, the last serious Gaelic rising in Ulster, precisely because almost nobody would think to look here: a fort on a rock at the far north-western tip of the Isle of Doagh, at the head of Pollan Bay. The O’Dohertys built it in the 16th century, occupying it by 1600 under Phelim Breaslaigh Ó Doherty. After the rebellion failed and the Plantation of Ulster followed, it was abandoned around 1665 and left to four centuries of Atlantic weather.
By 2010 it was a ruin close to collapse. A local group, the Carrickabraghy Restoration Society, formed that year, raised over €30,000 alongside a National Rural Development LEADER grant, and finished stabilising the walls in December 2013. That’s the only reason there’s anything left to walk up to.
What’s actually here
Be clear about scale: this is a small stabilised ruin next to a working farm, a 30-minute stop rather than a day out. What survives is the shell of a tower house inside a bawn, with a smaller tower to the south thought to have belonged to a church. The walls run about 3 feet 9 inches thick. It sits not on limestone but on a hard outcrop of greenstone and rough quartz, the same rock scattered around the base, which is part of why it has lasted at all. The top is fully exposed to the wind off the Atlantic, so wrap up even in summer.
Time it for the Hissing Rock
If you do one thing here, come at high tide. In the rocks at the base of the headland is a fissure known locally as the Hissing Rock: when the tide is in, the sea is forced through the crack and spouts several metres into the air. It’s the most memorable thing on the site, and it only happens around high water, so check the tide times before you set out rather than after you arrive.
The views are the other draw, reaching on a clear day to Malin Head, Five Finger Strand, Pollan Bay and across to Fanad Head.
History in brief
The townland name, Carraig Bhrachaí, is usually translated as ‘Friars Rock’, though the meaning of Bhrachaí is genuinely debated, it may instead be an old personal name. Locally the place is just called ‘The Castles’. Long before the O’Dohertys, this was the seat of the McFall (Ó Maolfabhail) sept, who ran it as an administrative centre from the 9th century; the Annals of the Four Masters record a settlement here from 834 CE. The castle itself was probably raised by Gearalt Ó Dochartaigh, lord of Inishowen from 1526 to 1540, and is one of several surviving O’Doherty castles across the peninsula.
Getting there and visiting
From Ballyliffin, take the R238 north and follow the signs for Doagh Famine Village; the castle is roughly 6km on, at the northern end of Pollan Strand, and visible from the road. You can also walk the length of Pollan Strand from Ballyliffin to reach it. Parking is free in the lay-by opposite the site, which is open year-round from sunrise to sunset, with no admission fee (there’s a donations box). There are no toilets, café or shop, the nearest facilities are at Doagh Famine Village.
Nearby
- Doagh Famine Village – open-air museum of 19th- and 20th-century rural life, about 1km away.
- Pollan Strand – the long beach immediately below the castle, good for a walk and for birdwatching on passage in spring and autumn.
- Lagacurry Beach – a quieter strand about 1.2km off, linked by the coastal path.
- Ballyliffin – the nearest village, with a championship golf links and somewhere to eat.