Overview
The Sheehy Mountains (Irish: Cnoic na Seithe, ‘hills of the animal hides’) are a low, rugged range straddling the border between County Cork and County Kerry. They are built on Old Red Sandstone, worn down and gouged into deep valleys, rounded tops and scores of small lakes by Ice-Age glaciers. The high point is Knockboy (Cnoc Buí, ‘yellow hill’) at 706 m – the highest mountain in County Cork – with Caoinkeen (692 m), Knocknamanagh (637 m) and Gullaba Hill (625 m) behind it. The River Lee starts its run to Cork Harbour from the Coomroe valley on the eastern side.
Be honest with yourself about what you’re here for. If you want a serious, trackless mountain day, the summits deliver. If you want the scenery without the bog, go straight to Gougane Barra – the lake, the oratory and the forest park are the one stop almost everyone should make, and they ask nothing more than an easy walk.
Gougane Barra
In the Coomroe valley, Saint Finbarr founded a hermitage in the 6th century on a small island in the lake. The tiny St Finbarr’s Oratory still stands on it, reached by a short causeway, and it’s one of the most photographed spots in West Cork – stillest and best in early morning before the light tour buses arrive. Behind the lake, Gougane Barra Forest Park is the only forest park in Ireland you can drive into, with a one-way loop road and a network of marked walking trails branching off it:
- Slí Doire Na Coise – about 1.8 km, an easy lakeside loop.
- Slí an Ghaorthaidh (Nature Trail) – about 0.5 km, easy, with panels on the local flora and old field walls.
- Slí Laoi (The Lee Trail) – about 1.3 km, a moderate climb with stone and timber steps.
- Slí an Easa (Waterfall Trail) – about 1.8 km, strenuous, passing several cascades.
- Slí Sléibhe (The Mountain Trail) – about 2.5 km, the longest, opening onto views over the lake and peaks.
Entry to the forest park is €5 per vehicle at the barrier, which now takes tap payments as well as coins. Walk or cycle in from the lakeside road and it’s free.
Knockboy and the open mountain
Knockboy is the prize for hillwalkers: as Cork’s highest summit it gives wide views over both counties on a clear day. Reckon on three to four hours up and down. This is open, exposed ground – loose stone, peat hags, no marked path – so it needs boots, a map and the navigation to use them, not a phone and good intentions.
The four-summit Shehy Mountains Challenge links Knockboy, Caoinkeen, Knocknamanagh and Gullaba Hill. It’s a flexible, self-guided outing registered through High Point Ireland, and it is explicitly for experienced, well-equipped hillwalkers who can navigate rough, exposed terrain in any weather – not a day out for beginners.
Shehy Highland Park
A gentler option sits 4.4 km from the Cousane Gap: Shehy Highland Park, a working sheep farm opened up as a walking park, with picnic areas and three waymarked loops through woodland and open hill past standing stones and old hut-circle foundations:
- Orange Loop – easy, 1.84 km, about 40 minutes.
- Green Loop – moderate, 4.67 km, about 1.5 hours.
- Red Loop – strenuous, 9.27 km, about 3 hours.
Entry is €5 per person (QR code or cash box on site, exact change appreciated), open daily 9am–5pm (to 4pm in winter). No dogs or bikes are allowed on the trails. Free overnight campervan parking is offered inside the car park, with fresh water but no hook-ups.
History and the Cousane Gap
People have lived in the Sheehys for at least 5,000 years, and the foothills are dotted with Neolithic monuments, ringforts and fulachta fia (ancient cooking pits). The Cousane Gap, the road cut through the range in the late 1820s by the geologist Sir Richard Griffith, links Cork to Bantry Bay and marks the old division between the baronies of Carbery, Bantry and West Muskerry. The remote valleys gave cover to IRA and anti-Treaty columns during the War of Independence and the Civil War.
Wildlife
The Sheehys are blanket bog, rough grassland and patches of conifer plantation. The animals are mostly lowland species, but the Irish hare, the stonechat and the raven are all seen more often up here. In the wettest ground, look for carnivorous plants – butterworts and sundews – among the heather and bilberry. Gougane Barra rewards a photographer best in the early morning or just after a shower, when the lake goes mirror-still beneath the peaks.
Practical Information
- Access: The Cork side is reached on the R585; main trailheads and parking are at Gougane Barra Forest Park, Shehy Highland Park and the base of the Knockboy route. A car is essential – buses serve Bantry and Kenmare but not the trailheads.
- Fees: Gougane Barra €5 per vehicle (tap or coins); Shehy Highland Park €5 per person. The open mountain is free.
- Best time: Late spring to early autumn (roughly May to August) gives the most settled weather.
- Safety: Mountain weather turns fast. Carry waterproofs, a map or GPS and a charged phone, and wear boots – the higher trails cross soft peat and loose stone.
- Food and beds: The Gougane Barra Hotel, on the lakeside, has rooms with lake views and is the obvious base near the trails; Bantry, Glengarriff and Kenmare have a wider choice of B&Bs and hotels.
If you do just one thing, walk the causeway to St Finbarr’s Oratory first thing in the morning – come midweek and out of high summer, and you may have the lake to yourself.