Overview
Knockbrack is a Neolithic court tomb – locally the Druid’s Altar – built low into a field wall above Sellerna Bay, a short walk out of the fishing village of Cleggan in County Galway. Its four-metre capstone still sits on its supports, and the entrance frames the sunrise over the Atlantic to the east. It’s free, unstaffed and open at any hour, which makes it a good early-morning or late-afternoon walk rather than a headline stop.
A Glimpse into the Neolithic Past
Knockbrack is a court tomb, a communal burial type built across the northern half of Ireland between roughly 4000 and 2500 BC. Its gallery runs about four metres and is split into two chambers by a septal stone; the east-facing entrance is framed by two upright portal stones, and a single capstone, roughly four metres by one, rests on a cluster of low supports. The semi-circular court that once fronted it has mostly eroded away. The whole thing is built into a field wall, which is part of how these tombs survived at all – too awkward to clear, so the farmer built around them.
The tomb faces east, so around the equinoxes the sunrise lines up with the entrance. Whether the builders intended that is anyone’s guess; nothing here appears to have been excavated to find out. What we do know comes from similar court tombs elsewhere in Ireland, which have given up human remains, pottery and stone tools – the burial grounds and gathering points of Ireland’s first farmers.
Legends of the Druid’s Altar
The name “Druid’s Altar” is a romantic 18th- and 19th-century invention, hung on the tomb during the Celtic Revival when almost any standing stone got roped into a druidic past it never had. Older local names are earthier: the tomb is also called “Labbadermot” or “Diarmuid’s Bed,” after the runaway lovers of the Diarmuid and Gráinne legend. And there’s a persistent story that the channels on the capstone were cut to drain a sacrificial victim’s blood into the ground – a good tale with no archaeological basis whatsoever.
The Walk to Knockbrack
Reaching the tomb is part of the experience. The trail begins near the car park in Cleggan and follows a low fence line across a mosaic of blanket bog and heathland. It’s roughly 800 metres (0.5 miles) each way, signposted, and mostly flat, with a gentle ascent of about 30 metres near the outcrop.
The walk is easy enough for most families, but the ground turns soft and slippery after rain, and there’s no shelter anywhere on the open bog. Sturdy shoes and a layer against the Connemara weather are the two things worth bringing.
Views & Photography
The reward for the short walk is a panoramic vista that stretches across Sellerna Bay to the Atlantic Ocean. On clear days, the distinctive outline of Inisbofin is visible on the horizon. The east-facing orientation of the tomb makes sunrise visits particularly striking, especially around the spring and autumn equinoxes when the light aligns with the ancient court.
Photographers will appreciate how the monument’s silhouette changes throughout the day. The combination of weathered stone, rolling bog, and crashing waves provides compelling foreground elements. Winter visits offer stark, moody landscapes, while spring brings purple heather and ling to the surrounding slopes. Birdwatchers can keep an eye out for skylarks, meadow pipits, and coastal seabirds like gulls and terns.
Practical Information
- Location: South shore of Sellerna Bay, near Cleggan, County Galway.
- Access: Free parking is available in the village car park. Follow the signposted footpath to the tomb (approx. 10–15 minutes walk).
- Opening times: Open year-round, 24 hours a day.
- Facilities: There are no visitor centres, toilets, or refreshments on site. Bring water, a warm layer, and a camera.
- Safety: The capstone is unstable in parts and should not be climbed. Stay on the marked path and exercise caution near the cliff edge, especially in wet or windy conditions.
- Getting there: Drive along the N59 and turn off for Cleggan. Public transport options include Bus Éireann route 450 from Galway city, which stops in the village.
Nearby Attractions
- An Trá Mór – A Blue Flag beach located just north of the tomb, ideal for a post-visit stroll or a quick dip.
- Ballinakill Bay – A sheltered inlet featuring walking trails and excellent conditions for sea kayaking.
- Aran Islands – Accessible by ferry from Rossaveal (about 30 km north), offering a deeper exploration of Galway’s coastal heritage and ancient monastic sites.
Time it for early on a clear day – the tomb faces east, so first light catches the capstone with the bay behind it – and give yourself the extra half hour to follow the coast path before turning back for Cleggan.