The one thing you come to Lough na Cranagh for is the oval island near its middle. It’s a crannog – a man-made islet, roughly 30m by 25.5m, ringed by a drystone wall that still stands three to four feet above the water. It was built around a thousand years ago and later refortified by a McDonnell chieftain in the early 1600s. You don’t have to walk far to see it: the lake sits on the Fair Head plateau east of Ballycastle, and the water shows from the road before you’ve even parked.
The crannog
Most Irish crannogs survive only as submerged timber stumps or low, waterlogged mounds. This one keeps its shape: a clear oval outline and an intact stone wall you can read from the shore path. Local tradition puts a McDonnell chieftain on the island in the early 1600s, reinforcing its perimeter and building a dwelling there long after it was first raised. It’s one of the more legible examples in the north, and reason enough to make the short walk down to the water even if you do nothing else here.
Walking the trails
Three waymarked loops start from the car park, with maps and markers at the trailhead. The Red Route (2.4 km) is the one to do: it circles the lake, passes the other small loughs on the headland, and opens out to cliff and coastal views. The Blue Route – the Coastal Path, 4.2 km – runs longer along the cliff edge, and the Green Route (a farm-track loop) is the flattest and easiest if you have young children or tired legs.
The approach to the lake itself is short and level, fine for most people. Push on toward the cliff tops and the ground gets steeper and rougher, so wear boots. On a clear day the views take in Rathlin Island and, further out, the Scottish coast. This is also goat country – wild goats work along the crags of Fair Head – and the Grey Man’s Path threads down through the cliffs for anyone tackling the longer coastal walk.
For a fuller day on this stretch of coast, the Antrim Coast and Glens guide covers the wider trail network.
Fishing
The lake is a stocked brown-trout fishery run by the Fair Head Fishing Club, and it’s fly-only. The season runs 1 March to 31 October. Flies must be under three-quarters of an inch, the bag limit is three stocked trout, and the minimum size is 25.4 cm. Anyone aged 12 or over needs a DAERA rod licence, and day tickets come from the club. Boats are on the water only by arrangement with the club, so you can’t just launch your own.
Wildlife and landscape
Fair Head is dolerite: dark, hard rock forced up through older layers and cooled into the columnar joints that make the headland one of Ireland’s best-known trad-climbing venues. The whole peninsula is an Area of Special Scientific Interest, and in late summer the heath around the lake turns purple with bell heather. The animal you’re most likely to notice is a wild goat, picking its way along the cliff edge.
Getting there
From Ballycastle, take the A2 Cushendall Road, turn left at Ballyvoy onto Torr Road, then left onto Fairhead Road and follow it to the end. The last stretch is narrow.
Practical information
Parking – A £3 honesty-box fee covers the small car park; there’s no disabled parking. It fills on summer weekends, so come early. From the car park a short path leads straight down to the shore.
Facilities – None on the headland: no toilets, café or shop. Bring water and anything else you’ll want. The nearest pubs and toilets are in Ballycastle, about ten minutes away.
Safety – The plateau is exposed and the cliff edges are unfenced above a long drop. Stay on the paths, keep children close, and check the forecast – the weather turns fast up here.
Nearby – Pair the lake with Fair Head itself for the climbing and clifftop walks, or drop back into Ballycastle for Bonamargy Friary.
If you’ve only twenty minutes, skip the full loop and walk straight down to the near bank. The crannog wall is what you came to see, and it reads best from there.