Overview
On the summit of Seefin, in the western Wicklow Mountains, sits a passage tomb roughly 5,000 years old – built somewhere around 3300–3000 BC, older than Newgrange and older than the pyramids at Giza. Its corbelled roof never was completed, or has since fallen in, which is the reason to make the climb: you can look straight down into the chambers from above, rather than peering through a locked gate. The mountain’s Irish name, Suí Finn, means “Finn’s Seat”, tying it to the legendary Fionn mac Cumhaill.
Heights for the hill vary depending on who you ask: most maps put Seefin at 621 m, though Heritage Ireland’s own sign reads 650 m. Either way it’s a short walk to a big monument, and if you have an afternoon in this corner of Wicklow, the tomb is the thing to prioritise over the view.
The tomb
The tomb is cruciform, buried under a cairn of stones about 23 m across and some 5.5 m high. A passage roughly 9 m long runs in to a set of five compartments – a chamber with side cells. Look for the carved decoration on some of the stones, including a line of five parallel grooves cut into one of the roof slabs. When Professor Macalister excavated it in 1931 he found no human remains and no grave goods, so the tomb has kept most of its secrets.
It is a National Monument in State guardianship, and the rule is firm: external viewing only, no internal access. The cairn is fragile and unstable, so admire it from the outside and keep off the stones.
Seefin doesn’t stand alone. It is intervisible with the tombs on neighbouring Seefingan and Seahan, part of a scatter of hilltop passage tombs across the Dublin–Wicklow uplands whose builders clearly chose these summits for their long sightlines. You’ll sometimes read that the entrance was deliberately aligned on Newgrange and Knowth; that’s a nice idea, but it isn’t established, so treat it as speculation rather than fact.
The walk and what to expect
The most popular way up is the Seefin Loop from the Kilbride side: about 4.7 km with 323 m of ascent, and 2 to 2.5 hours on the hill. It is not a stroll. Sections are unmarked, so download an offline map before you go, and the descent in places runs down what is effectively a rocky creek bed. Going anti-clockwise gives a more gradual climb. Sturdy waterproof boots are essential – the ground is boggy for much of the year, and Wicklow weather turns fast, so carry waterproofs, water and a map even on a bright morning.
The summit gives a full 360-degree outlook: north across the Liffey valley towards the Dublin skyline, and south-west over Poulaphouca Reservoir to Kippure and the central peaks. Keep an eye out for red and roe deer on the way up, and for peregrine falcons overhead; underfoot it’s heather, bilberry and purple moor grass.
Fitter walkers link Seefin with Seefingan, Corrig and Seahan on an 11.1 km loop rated hard – a proper half-day over rough, trackless ground rather than an extension of the short walk.
Getting there and parking
The trailhead is off the minor roads on the Kilbride/Athdown side, south of Blessington. There’s no public transport, so you’ll need a car – and parking is the real bottleneck. There are only a couple of small car parks near the start, one of which holds three or four cars; when they fill, walkers park down near Kippure bridge or at a firebreak in the woods. Come early, especially at weekends.
One important warning: the approach passes close to Kilbride Military Camp, which has an active firing range. Red flags mean live firing is under way – if they’re flying, do not proceed onto the hill. Check before you set out.
Nearby
- Blessington Lakes – A short drive from the trailhead, good for fishing, kayaking and lakeside walks.
- Devils Glen – A steep-sided wooded valley with a shorter, more sheltered walk if the tops are clagged in.
If you time it for early morning you’ll likely have the summit to yourself, which is the best way to take in a tomb that has sat up here, open to the sky, for five millennia.