Overview
Slieve Bearnagh (Irish: Sliabh Bearnach, “gapped mountain”) rises to 739 m (2 425 ft) in the heart of the Mourne Mountains, County Down. Its twin granite tors, split by a natural notch, make it one of the most recognisable summits in the range. The mountain lies within the Mourne Area of Outstanding Natural Beauty and is crossed east‑to‑west by the iconic Mourne Wall – a 22‑mile dry‑stone barrier built between 1904 and 1922 to protect the Silent Valley and Ben Crom reservoir catchments. From the cairned summit hikers enjoy 360° panoramas that stretch from the Irish Sea to the Sperrin Mountains, Lough Neagh and, on exceptionally clear days, the Isle of Man.
History & Background
Geological heritage
Like the rest of the Mournes, Slieve Bearnagh is composed of Paleogene granite that solidified deep underground around 50‑60 million years ago during the Tertiary period. Millennia of weathering have produced the classic “onion‑skin” exfoliation that gives the tors their layered appearance, while the last ice age carved the surrounding U‑shaped valleys and left the harder granite standing.
Human history
The Mourne Wall, a monumental dry‑stone construction completed in 1922 by the Belfast Water Commissioners, crowns the summit and runs along the ridge to neighbouring peaks such as Slieve Meelmore and Slieve Meelbeg. Stonemasons worked the remote slopes for nearly two decades, fitting stones without mortar to delineate water‑catchment boundaries. The wall now serves as a reliable navigation aid for walkers and a tangible reminder of early‑20th‑century engineering.
The western col, Pollaphuca (“pool of the púca”), and the eastern Hare’s Gap are steeped in folklore; the latter is a natural wind tunnel that can produce sudden gusts even on calm days.
Getting There
The most common start points are the Trassey Track Car Park (free, limited spaces) and Meelmore Lodge Car Park (≈ £4/€5 per day, 2025 rates). Both are a short 10‑minute drive from the coastal town of Newcastle and are sign‑posted from the main A1 road. Public transport options are limited; the nearest bus stop is in Newcastle, from where a local taxi can reach the car parks.
What to See & Do
- Summit tors – The North and South tors require a short hands‑on scramble; the higher tor is the true summit. A small stone shelter sits beside the cairn.
- Mourne Wall – Follow the dry‑stone wall for several kilometres; it links Slieve Bearnagh to adjacent peaks and provides an easy‑to‑follow ridge line for navigation and photography.
- Hare’s Gap – This dramatic saddle between Bearnagh and Slievenaglogh funnels wind and offers a natural viewing platform for Ben Crom Reservoir.
- Flora & fauna – Upland heath supports heather, bilberry and dwarf willow. Birdwatchers may spot meadow pipits, ravens, red grouse and occasional peregrine falcons.
- Ben Crom Reservoir – A short walk east from Hare’s Gap leads to the reservoir; the area is popular for quiet lakeside strolls.
- Nearby attractions – After the ascent, a 15‑minute drive brings you to Slieve Donard, the highest Irish peak, or to the coastal town of Newcastle for pubs, cafés and seafood. Tollymore Forest Park (10 min) offers woodland walks and river trails, while the Ben Crom reservoir provides a tranquil 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 an extra summit and more ridge walking |
All routes are way‑marked as part of the Mourne Way and the Ulster Way. The ridge can be exposed; weather changes rapidly, so carry a waterproof jacket, map or GPS and plenty of water.
Seasonal Highlights
- May‑September – Long daylight and the best chance of clear views across Lough Neagh and the Sperrins.
- April & October – Spring wildflowers (heather, bilberry) and autumn colours on the lower slopes.
- Winter – Snow and ice can make the stone steps and scrambles hazardous; only attempt with winter‑grade boots and experience.
Safety & Tips
- Check the weather forecast before you set off; the summit can be windy, especially at Hare’s Gap.
- The stone steps are uneven; sturdy hiking boots with good ankle support are essential.
- Carry a map (OSNI Outdoor Pursuits) or a fully charged GPS device – the wall is a great navigation aid but can be confusing in poor visibility.
- Mobile signal is limited on the ridge; let someone know your planned route and expected return time.
- Dogs are allowed on the trails but must be kept under control, especially around the wall and during the breeding season for ground‑nesting birds.
Practical Information
Access & 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 & hostel |
| Both car parks are reachable via a short 10‑minute drive from Newcastle and are sign‑posted as part of the Ulster Way. |
Nearby Amenities
- Food & drink – The Meelmore Lodge café serves hot meals and tea; Newcastle town centre offers a range of pubs and seafood restaurants.
- Accommodation – Options include 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. All recognised routes are graded as hard or very hard and involve steep ascents, stone steps and occasional scrambling. A good level of fitness and some hill‑walking experience are recommended.
How long does the hike take?
The most popular Hare’s Gap route is about 9–11 km and typically takes 3.5–4 hours round‑trip, depending on pace and weather.
What is the best time of year to visit?
Late spring to early autumn (May‑September) offers the clearest views and the most reliable footing. Winter conditions can make the stone steps icy.
Can I bring my dog?
Dogs are permitted on the trails but must be kept under control, especially around the wall and during bird‑nesting season.
Where can I find a map of the area?
The OSNI Outdoor Pursuits map series covers the Mournes in detail. Digital maps are also available via the WalkNI app.
Slieve Bearnagh offers a blend of geological drama, historic engineering and unrivalled mountain scenery – a rewarding challenge for any experienced Mourne adventurer.