Glennagleragh

Overview

Glennagleragh, known in Irish as An Cnoc Beag (“the little hill”), stands at 617 m (2,024 ft), making it the third‑highest summit in the Partry & Joyce mountain group and the 260th‑highest peak in Ireland. The mountain straddles the border between County Galway and County Mayo in the rugged Connacht province. Its summit offers sweeping vistas across the surrounding valleys, the distant silhouette of Killary Harbour and the patchwork of peat‑blanketed hills that define western Ireland.

History & Background

The name An Cnoc Beag reflects the mountain’s modest stature compared with the nearby Maumtrasna massif, yet its limestone‑capped ridges have long guided locals across the Glennacally valley. Historically the area was part of the Joyce Country, a landscape of ancient stone walls, dry‑stone fences and seasonal grazing routes. While there are no recorded historic structures on the summit itself, the fence that marks the Galway‑Mayo boundary has been a long‑standing feature for shepherds navigating the high country.

Geology & Landscape

Glennagleragh sits on sandstone and conglomerate, with ignimbrite intrusions belonging to the Mweelrea Formation (MountainViews). The ridge is capped by limestone outcrops that give the summit its light‑coloured appearance. Early Ordnance Survey maps (Bald’s 1830 map) label the peak “Knock Beg”, a reminder of its older cartographic identity.

What to See & Do

Popular Loop from Loch Na Fooey

One of the most frequented routes begins at Loch Na Fooey (grid reference L95200 62200). The Glennagleragh and Devil’s Mother Loop is a 12.2 km circuit with 912 m of ascent, typically completed in just under four hours. Hikers traverse a well‑marked ridge that links Glennagleragh to the striking Devil’s Mother summit, then descend via the same ridge back to the loch. The loop is rated Difficult and rewards walkers with dramatic rock spurs, open plateaus and, on clear days, a glimpse of the Atlantic coastline.

Extended Maumtrasna Circuit

For those seeking a longer challenge, the Maumtrasna‑Glennagleragh circular route (track 2060) covers 17.3 km with an ascent of 1,085 m. Starting at Glennacally Bridge on the N59, the walk climbs the Maumtrasna summit before following the county fence south‑west to Glennagleragh, then on to Knocklaur and the Devil’s Mother ridge. The route includes a steep 45° final push to Maumtrasna’s summit and a series of ridge walks that demand careful navigation, especially on the descent from the Glennacally ridge.

Landscape Highlights

• Ridge Walks: The western side of the Glennacally valley offers a fine ridge that provides uninterrupted views of the surrounding peaks and the distant Killary Harbour.
• Border Fence: Walking along the historic fence gives a tangible sense of the Galway‑Mayo divide and often leads to unexpected viewpoints.
• Flora & Fauna: Upland peat bogs support heather, bilberry, and occasional sightings of red‑breasted nuthatch and meadow pipit. In late spring the area is dotted with mountain avens and cotton‑grass.
• Geology: Exposed limestone outcrops and glacially‑carved valleys illustrate the ancient forces that shaped the region.

Navigation & Maps

• Grid Reference: L95200 62200 (Irish Grid).
• OS Map Sheets: EW‑CON, MSW, and Sheet 38 cover the area.
• GPS Tracks: MountainViews provides downloadable tracks – track 2060 (Maumtrasna‑Glennagleragh circuit) and track 3852 (Loch Na Fooey loop). These include way‑points for the summit, Devil’s Mother and key junctions.
• Prominence: The summit has a modest prominence of 12 m (some sources note 16 m), meaning it is more a high point on the ridge than an isolated peak. There is no cairn or trig point at the top, so navigation relies on the fence and surrounding terrain.

Practical Information

Access & Parking

• The most convenient car park is a wide opening just east of Glennacally Bridge on the N59 (grid reference L58966 46113). From the gate, follow the east bank of the Glennacally River southward for about 1.5 km; the Glenfree River joins from the left.
• For the Loch Na Fooey loop, a small lay‑by near the loch provides informal parking; the trailhead is clearly sign‑posted.

Navigation

• The routes rely heavily on the historic fence and occasional stone walls for way‑finding. In poor visibility, the fence can be hard to follow, especially on the descent from the Glennacally ridge.
• The MountainViews GPS tracks (track 2060 and track 3852) are downloadable and include way‑points for the key summits.

Terrain & Equipment

• Expect a mixture of peaty bog ground, rocky spurs and steep grassy slopes. The final 200 m ascent to Maumtrasna is a 45° slope, while sections of the Glennagleragh ridge feature 30‑40° gradients.
• The Benwee spur (used on the 3852 route) is notably steep and can become slippery when wet; walking poles are strongly recommended.
• After heavy rain, sections may have liquefied peat and loose vegetation, making the ground treacherous.

Safety

• The area is classified as a risk sport by MountainViews; walkers should be confident in hill‑walking techniques and carry a map, compass and a fully‑charged phone.
• The route includes several steep descents where slips have been reported; a sprained ankle was noted on a recent winter walk.

Facilities

• There are no formal facilities on the mountain; water sources are limited to the Glennacally and Glenfree rivers, which may be cold and fast‑flowing.
• The nearest village with shops and accommodation is Clifden, approximately 30 km to the west.

Seasonal Advice

Late spring to early autumn offers the longest daylight and the most reliable footing. Early summer brings a burst of alpine flowers, while autumn can produce spectacular golden‑brown heather. Winter conditions often bring deep snow and icy bogs; the ridge can become hazardous and navigation more difficult. Always check the weather forecast and be prepared for rapid changes.

Nearby Peaks & Points of Interest

Glennagleragh sits amid a cluster of notable summits:

• Beuwee – 0.7 km north‑west, a modest rise offering a quick viewpoint.
• Knocklaur – 0.9 km south‑west, part of the same ridge line.
• Devil’s Mother – 1.2 km south, the other summit of the popular loop.
• Maumtrasna – 1.7 km east, the highest peak in the range at 682 m.
• Bunnacunneen – 4.6 km south‑east, a more remote granite dome.

These peaks can be added to a longer day‑trip for experienced walkers seeking a ridge‑hopping challenge.

Getting There

• From Galway City, take the N59 north‑west toward Clifden; the turn‑off for Glennacally Bridge is well‑signed. The drive takes roughly 1 hour 15 minutes.
• Public transport is limited; a private vehicle is the most reliable means of reaching the trailheads.

Conservation

The upland habitat is sensitive; walkers are asked to stay on established paths and avoid disturbing the peat bogs, which act as important carbon stores.

Enjoy the rugged beauty of Glennagleragh, where every ridge and fence tells a story of Ireland’s wild west.