The Boheh Stone (Irish: Cathaoir Phádraig, or St Patrick’s Chair) rests on a low, grassy hill just 6.4 km south-southwest of Westport in County Mayo. Designated as a National Monument, this quartz-flecked rock outcrop is widely regarded as one of Ireland’s most impressive examples of Neolithic rock art. Spanning roughly 4 square metres, the stone surface is densely packed with petroglyphs that have survived millennia of Atlantic weather, offering a rare glimpse into Ireland’s prehistoric past.
The Carvings & History
Carved sometime between 3800 and 2000 BC, the Boheh Stone bears approximately 250 individual markings, the highest concentration of its kind known in Ireland. The designs primarily consist of cup-and-ring motifs, where circular depressions are surrounded by one or more concentric rings, alongside a smaller number of distinctive keyhole shapes. For centuries, the carvings were largely overlooked or misinterpreted, with 19th-century antiquarian Kinahan describing the site in 1873 simply as a “pile of stones” in a field.
Modern archaeological work has continually revealed new layers to the stone’s story. In 2014, local historian Michael Gibbons uncovered a previously hidden panel of carvings, and in 2023, researcher Rónán Lynch proposed that the upper markings actually map the constellations Crux and Centaurus – star patterns that would have been visible from Ireland until roughly 4100 BC. This suggests the site may have functioned as both a territorial marker and an early astronomical observatory, tracking celestial movements long before written records.
The Rolling Sun Phenomenon
The Boheh Stone’s most celebrated feature is its precise alignment with the setting sun and the distant peak of Croagh Patrick. Situated 7.1 km to the west-north-west, the sacred mountain frames a striking solar event twice a year. On 18 April and 24 August (Gregorian calendar dates), the sun sets directly behind Croagh Patrick’s summit. From the vantage point of the stone, the disc of the sun appears to roll down the mountain’s northern shoulder before disappearing below the horizon.
Astronomer Gerry Bracken first documented this “rolling sun” phenomenon in the early 1990s. The dates align closely with traditional Celtic agricultural markers for sowing and harvest, reinforcing the theory that the stone’s placement was deliberately chosen to track seasonal changes vital to Neolithic farming communities. The alignment works because of the stone’s exact orientation and elevation (102 m), creating a fixed sightline that has remained unchanged for thousands of years.
Pilgrimage Routes & Christian Legacy
Long before the arrival of Christianity, the Boheh Stone sat along an ancient spiritual corridor connecting the western royal site of Rathcroghan in County Roscommon to the holy mountain of Croagh Patrick. When early Christian missionaries moved through the region, they adapted existing sacred geography to fit new traditions. The stone was renamed Cathaoir Phádraig and incorporated into Tóchar Phádraig, a pilgrimage route that drew devotees for centuries. Walking the path today, you can still sense the layered history of the landscape, where prehistoric astronomy and medieval devotion occupy the same quiet hillside.
Visiting & Practical Information
The Boheh Stone is a free, unstaffed site accessible year-round. There are no gates, opening hours, or admission fees. Visitors can park on the minor road just off the R335, roughly 300 metres from the outcrop, and follow a short footpath through the fields to the monument itself. The terrain is uneven and natural, with a sloping approach that may be difficult for those with mobility challenges or pushchairs. Dogs are welcome but should be kept on a lead to protect the fragile archaeological surface. As the site is fully exposed to the elements, waterproof footwear and a windproof layer are highly recommended, especially in autumn and winter.
Getting There
- By Car: From Westport, follow the R335 south-south-west for about 6 km. Look for the small layby and footpath signposted to the monument.
- Public Transport: Bus Éireann services run to Westport. From there, you can hire a taxi or join a local guided walk that includes the stone.
- Walking & Cycling: The stone is a popular stop on the Westport to Croagh Patrick walking route. Cyclists can also reach it via the Great Western Greenway by taking the connecting rural lanes south.
Accessibility
The terrain is uneven, with natural stone surfaces and a short, sloping path to the outcrop. While the site is reachable on foot, it may be challenging for visitors with limited mobility. There are no wheelchair-friendly facilities on site.
Nearby Amenities
Westport, a vibrant town only a short drive away, offers a range of accommodation, cafés and restaurants. For those wishing to extend their stay, the Westport House estate and the Great Western Greenway provide additional cultural and outdoor experiences. Nature lovers can also explore Ballycroy National Park, a short drive north, which boasts rugged coastline, peat-bog habitats and excellent walking trails. The historic village of Aughagower sits just a few kilometres away, anchoring the pilgrimage trail and offering local pub stops.
| Feature | Details |
|---|---|
| Entry | Free |
| Opening Hours | Open all year, no restrictions |
| Key Dates (Rolling Sun) | 18 April & 24 August |
| Parking | On-site free roadside layby |
| Nearest Town | Westport (≈ 6 km) |
| Accessibility | Uneven ground; limited wheelchair access |
| Nearby Attractions | Westport House, Great Western Greenway, Ballycroy National Park |
Plan your visit on a clear evening in mid-April or late-August to witness the rolling sun alignment, or visit on a bright morning when the quartz flecks in the rock catch the light and make the ancient carvings stand out. Bring a pocket guide to cup-and-ring motifs, and allow extra time to sit quietly and take in the unbroken view across Clew Bay to Croagh Patrick.