

The Trail Map:- OSI Map Series 16
The Gleniff horseshoe is a nice 10km loop along quiet roads with spectacular views and dramatic and wild Dartry Mountains. The walk also provides dramatic views of the Donegal Bay and the Ulster County beyond.
The Route
Begin at the Benwiskin Centre, turn left and continue for about 1.5km to junction. Veer left at yield sign southwards towards mountain for 1km to next junction. Continue straight following sign for Gleniff Horseshoe Valley.The 19th century Bartyes Mill Site is located on the left as you walk into the horseshoe. A lovely woodland walk has been developed at the Mill Site which takes you along under native Irish trees, babbling mountain streams and pretty waterfalls. It is a lovely spot to stop for a picnic.



Continuing along the road, the gradient begins to rise steeply, eventually veering right to offer the walker jaw dropping and almost vertical views of the Dartry Mountains. You actually pass multiple mountains – Truskmore (631m), Tievebaun (611m) and Benwiskin (514m). At the centre of these are the Cliffs of Annacoona, which can be viewed from right beneath the face of the mountain. Nearby is the legendary Diarmuid and Gráinne’s Cave, which you can view from the roadside beside the ruins of an old schoolhouse. Note that this cave is the highest of its kind in Ireland, but is also located on private property and on very challenging terrain. We do not recommend that anyone climbs to the cave! The road continues downhill until you meet the lower road where you make your way with care back to the trailhead.
Please note that access to Diarmuid and Gráinne’s cave crosses private land and is dangerous even for experienced hikers. The climb is steep and the terrain can become slippery, and the descent is particularly challenging. We have received reports of people getting injured here or having to be helped by the Sligo-Leitrim Mountain Rescue Team. We do not recommend this climb.




The Legend of Diarmuid & Gráinne
Irish mythology tells us the Diarmuid eloped with Gráinne, who was bethrothed to Fionn, the leader of the Fianna. He swore to track the lovers down, and as they crossed Benbulben, they hid in a cave located high up in the Dartry Mountains, which now bears their names. Having fled from here, Diarmuid was gored by a wild boar. Fionn alone had the powers to cure him, but he allowed water to slip from his hands instead of enabling Diarmuid to drink, and he died beneath the mountain.
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- Plan ahead and Prepare
- Dispose of waste properly
- Leave what you find
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- Be considerate of others
- Minimise the effects of fire
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