Overview
When Gretta Byrne’s team lifted the collapsed capstone here in the 1990s, they did it with wooden levers and rope, the way it was raised in the first place. That’s the appeal of Rathlacken Court Tomb: it’s a Neolithic monument more than 5,000 years old, exceptionally well preserved, and it was studied carefully enough to know how it was built. It sits in a peat bog in north-west Mayo, off a by-road near Lacken, and it doubles as the focal point of an 8 km Green Loop and an 11 km Blue Loop from the car park beside Lacken Church. If you only want the tomb, it’s a short walk down a track; if you want the walk, give it a half-day.
History
The tomb was first recorded in the 1950s by Major Aldridge but sat largely unstudied until the systematic excavation of 1990–1997, led by archaeologist Gretta Byrne with Heritage Service funding on land owned by Coillte. The dig exposed a circular court backed by three finely built chambers, massive upright orthostats, and the capstone that had fallen into the front chamber.
No human bone survived the acidic bog, but a probable cremation deposit turned up in one chamber alongside pottery sherds and stone tools. Next to the tomb, the excavators found a small Neolithic dwelling inside a stone-walled enclosure, its hearthstone still carrying a charcoal layer dated to roughly 4,600 years ago. Signs of Bronze Age re-use around 4,000 years ago suggest the place kept its meaning for local people long after it was built.
What to see and do
The court tomb
You approach through a semi-circular court ringed by standing stones. Beyond it lie three linear chambers, each framed by large jamb stones, with most of the roof stones still in place – one has slipped to the side of the cairn. A thin door-stone leans against an entrance jamb, a rare survival of the original entrance architecture. The interior floor is water-logged, which is exactly what preserved the structure for millennia, and also why you can’t get right inside the chambers.
Walking trails
Both loops are marked with coloured fingerposts and start from the Lacken Church car park.
| Loop | Length | Difficulty | Approx. time |
|---|---|---|---|
| Green Loop | 8 km | Moderate | 2.5 hours |
| Blue Loop | 11 km | Hard | 3 hours |
The Green Loop sticks to quieter paved and bog roads and suits a steady walk. The Blue Loop adds three rougher kilometres up to Conaghrá, the high point of the route, where the view opens across Mayo, Sligo and Donegal – Seefin, Sralagagh and the Céide Fields all in sight.
Trail highlights
The routes pass a run of historical and natural sites:
- Lacken Strand: a sheltered inlet and Special Area of Conservation, with salt-marsh habitat for curlews, lapwings and golden plovers.
- Lacken Pier: a 19th-century pier with a 1977 monument to nine local fishermen who drowned here in 1927.
- The Gazebo: a rough-stone structure built in 1794, once a gentry picnic spot and a navigation aid for sailors, with views to Ben Bulben and Knocknarea.
- Castlelackan Demesne: the ruins of a castle dating to 1585, held by the Palmer family until 1916.
- Cillín: a traditional burial ground for unbaptised children, possibly on the site of an earlier cashel.
Practical information
Access to the tomb and the trails is free, and the site is open year-round with no formal hours. The honest caveat is the bog: the ground near the tomb turns muddy after rain, and even in a dry spell the chamber floor holds water. Waterproof boots and gaiters are the right kit, and stepping stones have been laid across the softest ground by the enclosure to keep your feet dry.
A small car park sits at the trailhead beside Lacken Church. Both loops suit mountain biking, though the steeper parts of the Blue Loop are for experienced riders. The site is wheelchair-accessible only from the car park to the short approach path; the uneven stonework and water-logged floor put the chambers themselves out of reach.
For the archaeological background, the excavation reports are online:
Getting there
By car: the most direct route is via the R310. From Ballina, follow signs for Lacken and turn onto the local road to the Lacken Church car park; the drive takes about 35 minutes.
Public transport: Bus Éireann route 445 runs Ballina–Ballycastle and stops at Lacken Cross, from where it’s roughly a 2 km walk to the tomb. TFI Local Link Mayo also serves Carrowmore Lacken but needs pre-booking, and weekend services are limited, so check timetables before you rely on them.
Cycling: the Green Loop is fine for a hybrid; the Blue Loop’s steeper, rougher sections are for experienced mountain bikers.
Seasonal advice
The trails are walkable year-round, but the boggy stretches get very soft through winter and early spring. Summer gives the most reliable footing and the long daylight you’ll want for the Blue Loop.
Nearby attractions
Rathlacken pairs well with other north Mayo sites for a full day:
- Ballycroy National Park: a wilderness of blanket bog with boardwalk trails, a drive to the south.
- Bangor Trail: a demanding upland walk across north-west Mayo, for experienced hikers.
- Achill Island: sea cliffs, sandy beaches and the Deserted Village, further along the coast.
Save the tomb for last on a dry evening: late-afternoon light rakes across the orthostats and the silvery bog stone, and the stepping stones let you get close to the water-logged chambers the Neolithic builders left behind.