Overview
Cuilcagh (Irish: Binn Chuilceach, roughly “chalky peak”) rises to 666 m (2,185 ft), sitting squarely on the border between County Fermanagh and County Cavan – the highest point in both. It is the centrepiece of the Cuilcagh Lakelands Geopark, a transnational UNESCO site stretching from Lower Lough Erne to Lough Oughter. The mountain’s flat top is draped in one of Western Europe’s largest intact blanket bogs, a slow-growing peatland built up over millennia; beneath it, the lower slopes step down through limestone, mudstone and sandstone. Worth knowing before you set your heart on the summit: you don’t actually reach it. The trail stops at a viewing platform, and access beyond it is closed to protect the fragile ground.
The trail: Stairway to Heaven
The Cuilcagh Boardwalk Trail begins at the Legnabrocky car park on Marlbank Road and runs about 11km round trip – expect two to three hours. It’s a linear out-and-back, not a loop. The first 4.5km is a wide gravel farm track that plods gently toward the bog edge; this is the dull part, and there’s a fair bit of it. Then the boardwalk takes over, winding across the peatland before the payoff: a steep flight of roughly 450 wooden steps – the “Stairway to Heaven” – up to the platform on the plateau’s rim. From there the view runs over Lough MacNean, the Cavan drumlins, and on a clear day the hills of Donegal, Leitrim and Sligo.
It’s graded moderate, but the staircase is the sting in the tail – slippery when wet and a genuine climb. Sturdy boots, waterproofs and a windproof layer are essential; conditions up top change fast. Winter walks want extra care for ice and short daylight.
Geology and the karst
Cuilcagh is a textbook karst landscape: limestone pastures, swallow-holes and underground drainage. Water sinking into the ground on these slopes eventually feeds the Shannon Pot, source of Ireland’s longest river and one of the country’s best-known karst features. The mountain’s twin status as a Special Area of Conservation and a Ramsar wetland reflects why the boardwalk exists at all – to keep boots off peat that takes centuries to recover.
Wildlife & Nature
The blanket bog’s low-nutrient environment supports species that are uncommon elsewhere in Ireland. Birdwatchers frequently spot red grouse striding through the heather, golden plover migrating in spring and autumn, and merlin hunting over the open moorland. Hen harriers occasionally appear during the breeding season. Closer to ground level, the bog hosts specialist flora including sundews, bog rosemary, and cross-leaved heath. The boardwalk exists specifically to keep foot traffic off the living peat, which can take centuries to recover from damage.
Planning Your Visit
Parking is the first logistical step. The Legnabrocky car park on Marlbank Road charges £6 per vehicle, which must be booked online in advance. A smaller farm-track entry exists on the north side, while free parking is available at Killykeeghan Nature Reserve for those starting from the Cavan side. Public transport options are limited; buses run to Belcoo and Derrygonnelly, after which a local taxi is needed to reach the trailhead.
Facilities at the trailhead include picnic tables and an information board. There are no toilets on the mountain itself. The nearest public facilities are at Killykeeghan Nature Reserve and the Marble Arch Caves Visitor Centre. Mobile reception is unreliable across the plateau, so it is wise to download maps beforehand and tell someone your expected return time. Dogs are not permitted on the boardwalk to protect the habitat, and the steep stairs mean the route is not suitable for wheelchairs or pushchairs.
When to go, and what’s nearby
The clearest views and most active wildlife come from late spring through early autumn. Mornings catch the light on the limestone; afternoons give you a better chance of raptors riding the thermals. If you’re building a day around it, the Marble Arch Caves Visitor Centre is minutes away – café, toilets and guided cave tours – and Cavan Burren Park, Florence Court and Lough Navar Forest are all within an easy drive.
One last practical note that trips people up: the walk is free, but the car park is not, and it must be booked in advance. Sort the £6 slot online before you leave home, or start from the free car park at Killykeeghan on the Cavan side. Then bring more layers than you think you need.