The drive
This is Táin country. The Cooley Peninsula is the Cúailnge of the Táin Bó Cúailnge, the Ulster Cycle epic in which Queen Medb of Connacht marches on Louth to steal the Brown Bull and the young Cú Chulainn holds the border alone. Slieve Foy (Sliabh Feá, ‘mountain of the woods’) is the high point at 589 m, a quartzite ridge that drops almost straight into Carlingford Lough, the sea inlet that marks the border with Northern Ireland. The whole peninsula is only about 155 sq km, wedged between the lough and Dundalk Bay, which is what makes it drivable in an afternoon.
If you only do one thing here, spend it in Carlingford. Carlingford is a walled Norman town that kept its medieval street plan, with the ruins of King John’s Castle above the harbour and free parking within a short walk of both. It’s the natural base and the one stop worth lingering over.
There’s no single official loop, and no reliable figure for its length: guides put the scenic circuit anywhere from 40 km to 80 km, the difference being how much of the back-country and coast road you fold in. Pick the version that suits your day. The road is free of tolls and gates the whole way.
The stops worth pulling in for
- Carlingford town – Medieval streets, independent shops and a working harbour. Free parking near the castle and waterfront.
- Carlingford Greenway – A flat, 7 km off-road path on a disused railway line from Carlingford to Omeath, with the Mourne Mountains across the water the whole way. Good for an easy cycle or a stroll.
- Proleek Dolmen – A portal tomb of around 3000 BC, its capstone reckoned at somewhere between 35 and 40 tonnes. Tradition says a pebble that lands on top and stays earns you a wish.
- Templetown Beach – A sheltered sandy bay named for the Knights Templar, who held land here after the Norman invasion. Lifeguarded in the summer bathing season.
- The hills – The waymarked Táin Trail is a 26 km loop over the Cooley Mountains for a full day’s walking; shorter options are the Slieve Foy and Barnavave loops from Carlingford and the 8 km Annaloughan forest circuit near Grange, which starts and ends at Fitzpatrick’s Bar.
- Greenore & Omeath – Quiet former railway villages on the lough shore, with small harbours and coastal viewpoints.
- Cooley Distillery – The distillery that reopened independent Irish whiskey production in 1987 sits a short detour off the route. Public access has come and gone over the years, so ring ahead before driving out expecting a tour.
- Carlingford Adventure Centre – Rock climbing, zip-lining, archery, kayaking and paddleboarding for families and groups.
History and legend
The bedrock is Silurian sandstone laid down over 400 million years ago, capped about 60 million years ago by the volcanic rock that gives the Cooley Mountains their sharp profile. People came far later, and left monuments that still hold the skyline: the Proleek dolmen above, and, a few kilometres inland, the Hill of Faughart, where Edward Bruce, brother of Robert the Bruce, was killed in 1318, ending the first Scottish attempt to take Ireland.
The myth sits on top of all of it. Beyond the Táin, Slieve Foy is tied to Fionn MacCumhaill, and coastal names like the Long Woman’s Grave keep older stories alive with no written source at all.
Getting there and practical notes
The peninsula is roughly an hour to ninety minutes from Dublin (M1 north to junction 12, then the R173) and a bit over an hour from Belfast (M1 south to junction 16, onto the same R173). One thing to know before you plan: public transport onto Cooley is thin, so this is really a drive.
Most parking along the route is free, including in Carlingford town centre. Carlingford Marina charges a flat €2, waived for its patrons. Toilets are in Carlingford town and at the marina.
The Carlingford Lough Ferry crosses from Greenore to Greencastle in County Down in about 20 minutes, but it runs seasonally and pauses for maintenance and over winter, so check current sailings before you count on it. Castle Roche and Cranfield Beach are both within a 15-minute drive if you want to stretch the day.
End it on the Carlingford Greenway if the weather holds: 7 km of flat, off-road path on an old railway line, the Mournes across the lough the whole way.