Overview
Many hillwalkers rate Slieve Bearnagh the toughest climb in the Mournes – not the highest, but the one that makes you use your hands. Its twin granite tors, split by a natural notch, give it the most recognisable outline in the range. Bearnagh (Irish: Sliabh Bearnach, ‘gapped mountain’) rises to 739m (2,425ft) in the heart of the Mourne Mountains, County Down, within the Mourne Area of Outstanding Natural Beauty. The Mourne Wall – a 22-mile dry-stone barrier built between 1904 and 1922 to protect the Silent Valley and Ben Crom reservoir catchments – crosses the mountain east to west. From the cairned summit, the view runs from the Irish Sea to the Sperrins, Lough Neagh and, on the clearest days, the Isle of Man.
History and background
Geological heritage
Like the rest of the Mournes, Bearnagh is Paleogene granite that solidified deep underground around 50–60 million years ago. Millennia of weathering produced the ‘onion-skin’ exfoliation that gives the tors their layered look, while the last ice age carved the surrounding U-shaped valleys and left the harder granite standing proud.
Human history
The Mourne Wall, completed in 1922 by the Belfast Water Commissioners, crowns the summit and runs along the ridge to Slieve Meelmore and Slieve Meelbeg. Stonemasons worked these remote slopes for the best part of two decades, fitting the stones without mortar to mark the water-catchment boundary. It now doubles as a reliable navigation aid.
The western col, Pollaphuca (‘pool of the púca’), and the eastern Hare’s Gap are both steeped in folklore, and Hare’s Gap sits on the Brandy Pad, a historic smugglers’ route that ran contraband – brandy, tea, tobacco – up from the coast and across the mountains. The gap is also a natural wind tunnel that can produce sudden gusts on an otherwise calm day.
Getting there
The usual start points are Trassey Track Car Park (free, limited spaces) and Meelmore Lodge Car Park (about £4/€5 per day, 2025 rates); the Ott car park is another free option. All are a short 10-minute drive from Newcastle and signposted from the main A1. Public transport is limited – the nearest bus stop is in Newcastle, from where a local taxi can reach the car parks. Arrive before 9am at weekends and bank holidays, as Trassey Track fills fast.
What to see and do
- Summit tors – The North and South tors need a short hands-on scramble; the higher tor is the true summit, with a small stone shelter beside the cairn.
- The Bearnagh Slabs – A steep slab descent drops off the summit; it is a genuine route but demands extreme care, especially when the granite is wet.
- Mourne Wall – Follow the dry-stone wall for several kilometres to the neighbouring peaks; it makes an easy-to-read ridge line for navigation and photography.
- Hare’s Gap – The dramatic saddle between Bearnagh and Slievenaglogh funnels the wind and looks out over Ben Crom Reservoir.
- Flora and fauna – Upland heath of heather, bilberry and dwarf willow; watch for meadow pipits, ravens, red grouse and the occasional peregrine falcon.
- Nearby – A 15-minute drive reaches Slieve Donard, Northern Ireland’s highest peak, or Newcastle for pubs, cafés and seafood. Tollymore Forest Park (10 min) has woodland and river trails, and the Ben Crom reservoir is a quiet lakeside stroll.
Walking routes
| Route | Starting point | Distance (round-trip) | Elevation gain | Typical time | Difficulty |
|---|---|---|---|---|---|
| Hare’s Gap (classic) | Trassey Track car park | 9–11 km | 614 m | 3.5–4 hrs | Hard – steady climbs, steep pitches, stone steps and a short scramble on the tors |
| Mourne Wall direct | Meelmore Lodge | 8 km | 549 m | 2.5–3 hrs | Hard – continuous wall navigation, fewer walkers, exposed ridge |
| Loop via Slieve Meelmore | Meelmore Lodge | 12 km | 680 m | 4–5 hrs | Very hard – adds a summit and more ridge walking |
Routes are way-marked as part of the Mourne Way and the Ulster Way. The ridge is exposed and the weather turns fast, so carry a waterproof, a map or GPS and plenty of water. This is not a beginners’ hill: the tor scramble and the Bearnagh Slabs are where people get caught out.
Seasonal highlights
- May–September – Long daylight and the best chance of clear views to Lough Neagh and the Sperrins.
- April and October – Spring heather and bilberry, autumn colour on the lower slopes.
- Winter – Snow and ice make the stone steps and scrambles hazardous; only attempt with winter-grade boots and experience.
Safety and tips
- Check the forecast before setting off; the summit and Hare’s Gap can be fierce in wind.
- The stone steps are uneven – sturdy boots with good ankle support are essential.
- Carry an OSNI Outdoor Pursuits map or a charged GPS; the wall helps but can confuse in poor visibility.
- Mobile signal is limited on the ridge, so tell someone your route and expected return.
- Dogs are allowed but must be kept under control, especially near the wall and during the ground-nesting bird season.
Practical information
Access and parking
| Starting point | Parking fee | Facilities |
|---|---|---|
| Trassey Track Car Park | Free (limited spaces) | Free toilet nearby, no café |
| Meelmore Lodge | £4 / €5 per day (2025) | Café, toilets, showers, camping and hostel |
| Both are a 10-minute drive from Newcastle and signposted as part of the Ulster Way. |
Nearby amenities
- Food and drink – The Meelmore Lodge café does hot meals and tea; Newcastle town centre has pubs and seafood restaurants.
- Accommodation – The Meelmore Lodge hostel, B&Bs in Newcastle and campsites at the foot of the Mournes.
Frequently asked questions
Is Slieve Bearnagh suitable for beginners?
No. Every recognised route is graded hard or very hard, with steep ascents, stone steps and scrambling. Some hill-walking experience and a good level of fitness are needed.
How long does the hike take?
The popular Hare’s Gap route is about 9–11 km and takes 3.5–4 hours round-trip, depending on pace and weather.
What is the best time of year to visit?
May to September gives the clearest views and the most reliable footing. Winter can leave the stone steps icy.
Can I bring my dog?
Yes, but keep it under control, especially near the wall and during bird-nesting season.
Where can I find a map of the area?
The OSNI Outdoor Pursuits series covers the Mournes in detail, and digital maps are available via the WalkNI app.
Start early to secure parking at Trassey Track, and keep the Mourne Wall close on your left approaching Hare’s Gap so you don’t get turned around in the mist.