Glenummera Valley

Overview

Glenummera Valley (Irish: Gleann Iomaire) lies in the barony of Murrisk, County Mayo, on the western fringe of the Sheeffry Hills. The valley runs east‑west between the towering peaks of Ben Gorm and Ben Creggan to the south and the Sheeffry range to the north, offering a classic glacial‑carved landscape of steep ridges, boggy floor and a meandering river. Its grid reference places it at 53° 39′ 7″ N, 9° 44′ 41″ W (≈53.652 N, ‑9.745 W) and it is recorded on Logainm.ie as part of the townland of Glenummera in the civil parish of Kilkeever.

History

The name Gleann Iomaire translates loosely as “valley of the ridge”, reflecting the way the valley is hemmed in by a series of sharp ridgelines that were sculpted during the last Ice Age. Historically the area is listed as the 10 486th largest townland in Ireland and the 691st in County Mayo, but it has never developed a permanent settlement; instead it has long served as a natural corridor for shepherds and, more recently, for hill‑walkers seeking the remote peaks that surround it.

What to See & Do

The valley is the most convenient launch‑point for several of Mayo’s most rewarding mountain hikes:

Ben Gorm & Ben Creggan

Both peaks rise to just under 700 m and dominate the southern skyline of the valley. The route from Glenummera begins with a steep, boggy ascent that quickly gives way to a rocky ridge. The final 200 m to each summit is a light scramble with no defined path, so careful footwork is essential. From the summit cairn on Ben Creggan you can step down a short distance to capture the classic view of Doolough Valley framed by the sheer cliffs of Ben Lugmore and the distant silhouette of Mweelrea – a vista often described as “one of Ireland’s finest”.

Barrclashcame & Tievummera

These two Sheeffry peaks are linked by a narrow, high‑altitude ridge that offers uninterrupted 360° panoramas. The ridge walk is exposed, with occasional open fault lines that can be up to 15 ft deep; in winter or fog these require extra caution. The approach from Glenummera is longer but less steep than the Doolough side, making it the preferred line for hikers who wish to avoid the initial vertical climb.

Additional Highlights

• Glendavock Ridge – a striking spur that runs westward from the valley floor, offering glimpses of the uninhabited Glendavock Valley and the distant peaks of the 12 Bens of Connemara.
• Sheeffry Pass – the scenic mountain pass that can be driven from the Westport side, providing dramatic photo opportunities before you even set foot on the trail. More detail on the pass can be found here.
• Historical curiosity – a 2016 discovery of Neolithic skeletal remains within one of the fault lines on Ben Gorm/Ben Creggan adds an archaeological layer to the landscape.

For a full route description, see the dedicated Ben Gorm & Ben Creggan hike guide.

Flora & Fauna

The valley’s mix of blanket bog, heath and rocky outcrops supports a range of upland species. Walkers often spot red deer, hares and the occasional golden eagle soaring above the ridges. In late summer the heather and bilberry bloom, adding colour to the otherwise muted landscape. Butterflies such as the silver‑studded blue are common on sunny days, while the streams host brown trout.

Nearby Attractions

Glenummera Valley sits within easy reach of several other points of interest:

• Aasleagh Falls – a dramatic waterfall on the River Erriff, reachable via a short side‑track from the alternative Ben Gorm route. See the dedicated page for more details: Aasleagh Falls.
• Sheeffry Pass – the mountain pass that offers a dramatic drive and photo stops before you begin any hike.
• Westport – the lively town on the edge of Clew Bay, with a range of accommodation, restaurants and a historic harbour.
• Leenaun – a small village at the head of Killary Harbour, ideal for a quick bite or overnight stay before tackling the valley routes.

Practical Information

Access & Parking

The valley is reached via the R335 road, a short detour west of the village of Leenaun. A small lay‑by on the road serves as the only car park; it accommodates a single vehicle, so early arrival in the busy summer months is advisable. Check locally for any seasonal parking restrictions.

Public Transport

Leenaun is served by Bus Éireann services from Westport and Ballina. Verify the latest timetable if you plan to rely on public transport, as services are infrequent, especially outside the summer season.

Navigation

No way‑marked trail exists. Hikers should carry a detailed map (Ordnance Survey Ireland 1:25 000) or a reliable GPS device, and a compass is recommended because the ridge can disappear in low cloud.

Water

A small pond sits on the ridge near the summit of Ben Creggan; water can be boiled for drinking if required. No other reliable water sources are found on the route.

Seasonality

The dry months of May, June and September provide the most reliable footing, but the valley is accessible year‑round. In winter the boggy sections can become icy and the open fault lines may be concealed by snow, increasing the need for experience and proper equipment.

Dog‑friendly Information

Dogs are permitted on the valley trails but should be kept under control, especially in sensitive bog areas and where livestock may be present. A lead is recommended in winter when the ground is icy.

Facilities

There are no visitor facilities, toilets or cafés in the valley. The hike is free of charge and open to the public at all times.

Safety

The final ascent to each summit involves loose rock and occasional steep scrambles. The open fault lines are a genuine hazard; avoid them in wet or snowy conditions. Mobile reception is limited, so inform someone of your intended route and expected return time.

Nearby Bases

The villages of Leenaun and Westport provide a range of accommodation, from guesthouses to hotels, and are useful staging points for multi‑day treks in the Sheeffry and Mweelrea ranges.

Coordinates

Enjoy the solitude, the dramatic geology and the sweeping vistas that make Glenummera Valley a hidden gem of County Mayo.