Lakes, Rivers & Waterfalls in County Fermanagh

Two water systems account for most of this list. The Erne runs 120km from the Cavan hills through Upper and Lower Lough Erne to the sea at Ballyshannon, spreading into more than 150 islands on the way, and the places along it are strung out accordingly: Carrybridge, a small boating hamlet where a bridge crosses to Inishmore on the upper lough; Crom Estate, a National Trust reserve of ancient oak woodland and a burnt-out castle shell; Derrylin on the A509 towards the Cavan border; and Irvinestown, a working town in the north that works as a base for the lower lough.

The second system is underground. The Aghinrawn and the Owenbrean rise on Cuilcagh, sink into swallow-holes and join a third river to feed the Marble Arch Caves, where the 75-minute tour includes a boat ride when water levels allow. Above them the Cuilcagh boardwalk crosses the blanket bog from Belcoo, and the Cliffs of Magho, 300m over Lower Lough Erne at the top of the Lough Navar Forest Drive, give the view that ties the basin together.

The southwest corner sits on the border. Lough MacNean has Belcoo and Blacklion on the neck of land between its two basins; Lough Melvin straddles into Leitrim. Rainfall governs a good deal here: the cave boat, the karst rivers and the canoe water on the Arney all change with it.

Where to start

  1. Cliffs of Magho – above Lough Erne Magho

    A 300m escarpment above Lower Lough Erne where the viewpoint at the top of the forest drive takes in four counties.

  2. Aghinrawn River – the river that vanishes

    Drains the largest karst basin in Northern Ireland before vanishing into a swallow-hole and feeding the river that runs through Marble Arch Caves.

  3. Carrybridge – boating on Upper Lough Erne Enniskillen

    A small boating and fishing hamlet on Upper Lough Erne, and a quiet base for the lakelands with the UK's first inland RNLI station.

  4. Derrylin – Fermanagh Village by Lough Erne Derrylin

    A rural village on the A509 near the Cavan border, with the ruins of Corratrasna Castle and walks along Upper Lough Erne.

  5. Lough MacNean – border lake and sculptures Border of County Fermanagh (Northern Ireland) and Counties Cavan & Leitrim (Republic of Ireland)

    Two basins astride the border at the heart of the Cuilcagh Lakelands Geopark, ringed by a sculpture trail and a free amenity area.

16 of 16 shown — tap a pin for the place.

Lough MacNean, Co. Fermanagh
Lough MacNean, Co. Fermanagh Courtesy Of International Arts Festival, Tourism Northern Ireland

Lough MacNean – border lake and sculptures

Border of County Fermanagh (Northern Ireland) and Counties Cavan & Leitrim (Republic of Ireland), fermanagh

Lough MacNean lies in two basins on the border between Northern Ireland and the Republic, with the villages of Belcoo and Blacklion on the neck of land between them. It’s the heart of the Cuilcagh Lakelands Geopark, ringed by a 40-mile sculpture trail, island crannogs and a free amenity area with fishing, boats and a playground.

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Questions people ask

Which of these are actually on Lough Erne?
Carrybridge, Crom Estate, Derrylin and Aghalurcher sit on Upper Lough Erne, while Irvinestown and the Cliffs of Magho look to the lower lough. The River Erne and the Shannon-Erne Waterway link the whole system, the waterway running 63km across the border to the Shannon.
Where do the rivers that disappear underground actually go?
The Aghinrawn and the Owenbrean both rise on Cuilcagh, sink into swallow-holes and join a third river underground to form the Cladagh, which resurfaces in the Marble Arch Caves. The show cave tour follows that water on foot and, when levels allow, by boat.
How much does rainfall change a visit?
A fair amount. The boat section of the cave tour only runs when water levels allow, the karst rivers above ground swell and shrink with the weather, and the Grade 1 canoe water on the Arney changes with it. The Cuilcagh boardwalk crosses open bog with no shelter.
Do any of these cross into the Republic?
Several sit on the line. Lough MacNean lies between Belcoo in Fermanagh and Blacklion in Cavan, Lough Melvin straddles the Leitrim border, and the Shannon-Erne Waterway crosses it by design. Derrylin is on the A509 running down towards the Cavan side.
Which ones involve a real walk?
The climb to the Cliffs of Magho is a hard 2.5km through forest, though the viewpoint is also reachable from the Lough Navar Forest Drive. The Cuilcagh boardwalk from Belcoo and the 1.9km battlefield trail at Arney are gentler. Carrybridge and Crom are more about the water.

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