Overview
Old Head Wood Nature Reserve (Coill an tSeanbhinn in Irish) sits on a windswept headland overlooking the southern edge of Clew Bay. Spanning 17 hectares just west of Louisburgh in County Mayo, this semi-natural woodland is managed by the Irish National Parks & Wildlife Service. Designated as a national nature reserve in 1984 and protected as a Special Area of Conservation, the site is defined by its dramatic coastal position. The constant Atlantic moisture creates a humid micro-climate that has allowed a rare, dense understory of native oaks, ancient mosses, and coastal flora to thrive where little else survives.
Why the Woodlands Thrive Here
The reserve’s ecological significance lies in its bryophyte community. Over a hundred species of moss and liverwort have been recorded across the 17-hectare site, making it one of the most important collections in Ireland. The sea-facing slope traps moisture, allowing species like the rare shining sickle moss (Drepanocladus vernicosus) and several varieties of Sphagnum to flourish in the damp, shaded hollows. Visitors stepping onto the woodland floor will notice how the mosses cling to bark, stones, and fallen branches, forming a soft, emerald layer that shifts in colour as sunlight filters through the canopy.
The wood itself is a mosaic of native and introduced species. Ancient oaks form the structural backbone, supported by birch, rowan, and willow, alongside pockets of beech and sycamore. The Irish name, Coill an tSeanbhinn, translates roughly to “wood of the old head” or may derive from the personal name Seán, reflecting the long-standing human connection to this landscape.
Wildlife & Birdlife
The mix of mature canopy, dense undergrowth, and immediate coastal access creates a varied habitat for wildlife. Birdwatchers frequently spot tits, warblers, and finches foraging in the branches, while jays are often seen caching acorns – a natural process that helps regenerate the oak population. Red-breasted nuthatches and woodpeckers add to the woodland soundscape, and the Irish hare occasionally crosses the lower clearings.
The reserve’s position on the bay brings marine life into view. Gulls and razorbills patrol the waterline, and peregrine falcons have been recorded soaring over the cliffs. On clear days, seals can be spotted resting on the rocks or swimming near the shore. Winter months bring particular interest, as the adjacent Old Head beach draws surfers and reveals extensive rock pools when the tide recedes.
Walking & Exploring
Informal paths wind through the reserve, offering a quiet escape from the busier coastal routes. The terrain is largely flat but can be soft and muddy, especially after autumn and winter rains, so sturdy footwear is recommended. The walks are suitable for most ages, though visitors should keep dogs on leads to protect ground-nesting birds and sensitive bryophyte patches.
The contrast between the dark, moss-draped canopy and the bright expanse of Clew Bay provides excellent photographic opportunities. Higher viewpoints within the wood frame distant shots of the coastline, while ground-level photography rewards patience, revealing the intricate textures of liverworts and moss clusters. The National Parks & Wildlife Service periodically runs citizen-science surveys focused on moss identification, bird counts, and invasive species monitoring. Visitors interested in contributing to conservation can contact the NPWS office for upcoming volunteer opportunities.
Practical Information
- Area: 17 hectares
- Status: National Nature Reserve & Special Area of Conservation (designated 1984)
- Managing body: National Parks & Wildlife Service
- Access: Free parking at the reserve entrance off the R335
- Admission: Free
- Opening hours: Open year-round, dawn to dusk
- Website: NPWS – Old Head Wood Nature Reserve
- Coordinates: 53.776° N, 9.778° W
Getting There & Nearby
The reserve is located approximately 5 km west of Louisburgh on the R335 regional road. Follow the coastal signs toward the Old Head peninsula; the entrance is clearly marked with a small car park. For those arriving by public transport, services are limited in this stretch of the Wild Atlantic Way, making a private vehicle the most practical option. The nearest major hubs are Westport (45 km north) and Castlebar (55 km east).
A short drive north leads to Ballycroy National Park, which offers more extensive trail networks and mountain scenery. Back along the coast, the Old Head beach provides a popular spot for windsurfing and coastal foraging. If you plan to combine a woodland walk with a beach visit, check local tide tables first – the reserve’s lower paths and the adjacent shoreline are most accessible during mid to low tide.