Slieve Rushen

Overview

Slieve Rushen (also known as Slieve Russell or Ligavegra) rises to 404 m on the border between County Cavan and County Fermanagh. Its grey limestone core capped by sandstone and shales creates a distinctive silhouette, now punctuated by a line of modern wind turbines. The mountain forms part of the Slieve Rushen Bog Natural Heritage Area, a protected peatland that supports a range of flora and fauna. Geologically, the rocks were laid down over 300 million years ago and later reshaped by the last glaciation, leaving a patchwork of peat, conifer forest and grazing fields that can be explored on foot.

History

Human activity on Slieve Rushen stretches back to at least 3 000 BC, as evidenced by court cairns and wedge‑tombs scattered across the Doon, Aughrim and Aghnacally townlands. The mountain’s name derives from the Irish Sliabh Ruisín – “mountain of the little wood” – and appears in early medieval texts such as the Lebor Gabála Érenn (c. 1100) and the Annals of the Four Masters (1111 AD). During the Plantation of Ulster the summit was granted to John Sandford in 1613 and later passed to the Caulfeild family. In the 1641 Rebellion the hill was the scene of the Battle of Sliabh Russell, and it continued to feature in the turbulent wars of the 17th century. Today a traditional jig, “The Slieve Russell”, keeps the mountain’s martial past alive in music.

Geology & Landscape

The hill’s bedrock consists of horizontal layers of limestone overlain by Glenade sandstone and shales. After the last Ice Age, melt‑water deposited sands and gravels that now form the drift covering the summit. These drift deposits have been quarried for building stone and, more recently, for the sand‑and‑gravel needed by local contractors. The wind‑farm, installed in the 2010s, is a visible reminder of the area’s ongoing economic use.

Industrial Heritage – Millstones and Quarrying

Slieve Rushen was once an important source of millstones. 19th‑century Ordnance Survey memoirs record a “freestone quarry where very good millstones are made and sold to buyers from the neighbouring counties”. Recent community research (2024) has identified several abandoned millstone quarries on the eastern slopes, near Bawnboy and in the townlands of Doon, Barr and Stony Park. These stone circles, often found in river beds or on sandstone outcrops, illustrate a once‑thriving supplemental industry for upland farmers. Visitors interested in this hidden heritage can look for the distinctive, roughly‑circular sandstone blocks that once powered local gristmills such as the historic Tully Mill near Florence Court.

Flora, Fauna & Conservation

The Slieve Rushen Bog NHA (Site code 000009) protects blanket‑bog vegetation, heather, sphagnum mosses and a range of upland wildflowers. Birdwatchers may spot meadow pipits, skylarks and, on the western side, occasional whooper swans that winter on Upper Lough Erne. Because the peatland is a fragile carbon store, walkers are asked to stay on marked paths and avoid trampling the bog surface. The wind‑farm area is fenced in places; the designated viewpoint trail is the only public route through the turbines.

What to See & Do

Caves and swallow‑holes

The limestone karst hosts several caves, the most visited being Pollnagollum and Tory Hole in the Legavreagra townland. Both are popular with potholers; the entrances are clearly marked, but visitors should respect any safety signage.

Ancient monuments

Scattered across the slopes are prehistoric cairns and wedge‑tombs. The Aghnacally wedge tomb is a well‑preserved example that can be viewed from the walking routes without disturbing the site.

Wind‑farm panorama

A line of turbines crowns the summit ridge, offering a striking contrast between renewable energy and ancient landscape. From the wind‑farm viewpoint you can photograph sweeping vistas over Lough Erne, the Cavan drumlins and, on clear days, the distant Cuilcagh plateau.

Slieve Rushen Circle

The local tourism board promotes a 35 km “Slieve Rushen Circle” that strings together historic villages, waterways and natural sites. Highlights include:

• Ballyconnell – gateway town with Neolithic roots and the Woodford Canal walk (part of the Shannon‑Erne Waterway).
• Bawnboy – home to the 1853 Union Workhouse (exterior view only) and the remains of a 17th‑century bawn.
• Templeport Lough & St Mogue’s Island – early Christian monastic ruins on an island that also bears a WWII aircraft crash site.
• Brackley Lake – a favourite spot for coarse‑fish anglers.
• Swanlinbar – limestone outcrops rich in 330‑million‑year‑old fossils, especially corals visible at low water.
• Kinawley and Derrylin – villages with medieval church ruins and bird‑watching opportunities on Upper Lough Erne.

The full itinerary, including downloadable maps, is available from the Cuilcagh Lakelands website here.

Walking the summit

A popular 5.2 km loop (ascent 367 m, estimated 1 h 45 min) starts from a forestry road on the eastern side and climbs through heather‑covered slopes to the summit mound. The track is described on MountainViews here. An alternative, shorter option is to park at the wind‑farm lay‑by (grid H231 64 216 26) and follow the marked trail across the bog to the flat heather summit. Both routes are suitable for families, but winter footwear is advisable as the heather can become icy.

Practical Information

The Slieve Rushen Bog is protected under the Natural Heritage Area designation; visitors are asked to stay on marked paths to avoid damaging the peatland. The wind‑farm area is fenced in places, but the public may walk the designated viewpoint trail.

For further reading, see the official NPWS page on the Slieve Rushen Bog here and the Wikipedia entry here.