Slieve Commedagh

Overview

Slieve Commedagh (Irish: Sliabh Coimhéideach – “watching/guarding mountain”) is the second‑highest summit in the Mourne range, standing at 767 m (2,516 ft). It sits just north‑west of the iconic Slieve Donard, linked by a high col and bisected by the famous Mourne Wall. From the summit you can see the town of Newcastle, the Irish Sea, the glen of the River Glen to the east, and the rugged interior of the High Mournes to the west. The mountain is a magnet for walkers seeking dramatic scenery, a touch of history, and the thrill of a challenging ascent.

History & Heritage

The Mourne Wall, a 22‑mile (35 km) dry‑stone fence built between 1904 and 1922 by the Belfast Water Commissioners, runs over the top of Slieve Commedagh. It was erected to contain the water catchments that supply the city of Belfast and now forms a historic backbone for many of the range’s walking routes. The wall is a popular navigation aid and a key feature of the Mourne Sevens badge challenge.

At the summit sits a small single‑room stone tower, originally erected to shelter the wall‑builders; today it is largely unusable because of litter, but it remains a striking landmark.

Scattered on the summit are the remains of an ancient burial cairn, hinting at the mountain’s prehistoric significance.

The Brandy Pad smuggler’s trail

The southern flank of the mountain is traversed by the Brandy Pad, an 18th‑century smugglers’ track used to ferry brandy, tobacco, tea, silk and other contraband from Britain to the Irish coast. The trail winds beneath the granite tors known as “the Castles” and offers a tangible link to the mountain’s illicit past. Today the Brandy Pad is well‑marked and provides a relatively gentle walk compared with the steeper sections of the ascent.

The Castles granite tors

A distinctive group of granite tors crowns the southern side of Slieve Commedagh and is locally called “the Castles”. Their rugged pinnacles are popular with confident walkers for short scrambling bouts and provide dramatic foregrounds for summit photography.

Ice House

Near the Donard Car Park stands a 19th‑century stone Ice House, once used to keep meat cold for the Annesley family. It adds another layer of local heritage to the ascent.

Geology & Rankings

• Prominence: 180 m, giving the summit a distinct silhouette on the skyline.
• Irish ranking: 64th‑highest peak in the whole of Ireland and the second‑highest in County Down.
• Bedrock: Granitic granophyre – the same durable granite that underlies the entire Mourne range and has been quarried for building stone across the UK and Ireland.
• Grid reference: J346 10 286 16 (OS map sheet 29).

These facts underline why the mountain is a favourite for peak‑baggers and geology enthusiasts alike.

What to See & Do

Summit Highlights

• Stone Tower & Cairn – The tower provides a dramatic silhouette against the sky, while the cairn marks an ancient burial site.
• Panoramic Views – On a clear day you can spot the Newcastle coastline, the Pot of Legawherry, the Pot of Pulgarve, and the distant Isle of Man.
• The Castles & Brandy Pad – Walk beneath the granite tors and follow the Brandy Pad for a glimpse of the smugglers’ route.

Walking Routes

The most popular ascent begins at Donard Car Park in Newcastle, following the Glen River through Donard Forest. After passing the 19th‑century Ice House, the path becomes steeper, turning into stone steps that lead to the col where the Mourne Wall begins. From there, a right‑hand turn takes you up the wall to the summit tower. The route is steep and rocky, with built steps in sections, and the classic three‑peak loop (Slieve Donard, Slieve Commedagh, Slieve Bearnagh) is typically 14 km (9 mi) – sources vary between 14 km and 15 km, so allow extra time for detours.

For walkers who prefer a shorter, single‑peak experience, the Trassey Car Park route is an alternative. From the car park, follow the Trassey Track (way‑marked for the Ulster Way) to the col, then join the Mourne Wall and head straight to the tower. Both routes intersect the Brandy Pad near the Castles, allowing you to explore that historic track without committing to the full loop.

Route distances and variations

• Donard Loop (three‑peak) – Approx. 14 km (9 mi) round‑trip, 4‑5 hours for experienced walkers.
• Trassey single‑peak – About 8 km (5 mi) round‑trip, 3‑4 hours.
• WalkNI notes that some hikers record the loop as 8.8 mi (14 km); the figure of 15 mi previously quoted is therefore an estimate.

Guided Hike

A guided “Slieve Commedagh Hike” is offered from Donard Car Park. The walk is led by a qualified mountain leader, includes a briefing on the mountain’s history, and culminates at the summit tower. The price is £15.50 per adult, and booking is required. Participants must be 18 years or older and possess reasonable fitness.

Additional Activities

• Rock scrambling & bouldering – The granite tors of the Castles provide natural scrambling challenges for confident walkers.
• Mountain‑bike trails – Lower sections of the Donard Forest and the Trassey Track are popular with cyclists; the trail is moderate and well‑signposted.
• Photography – Sunrise and sunset shots from the summit are spectacular, especially when the sea is clear. The stone tower and the Castles make striking foreground elements.
• Mourne Sevens challenge – Slieve Commedagh is one of the seven highest Mourne peaks that form the “Mourne Sevens” badge route (Donard, Commedagh, Binnian, Bearnagh, Slieve Meelbeg, Slieve Meelmore, Slieve Muck). Completing all seven earns a badge and is a popular bucket‑list goal for peak‑baggers.

Seasonal Highlights

• Late spring to early autumn – Heather is in bloom and the sea is often clear, offering the best panoramic vistas.
• Winter – Snow can linger on the upper slopes, creating dramatic scenery and opportunities for experienced walkers comfortable with icy steps.
• Visibility – The summit is frequently shrouded in cloud; early morning departures improve the chance of clear views.

Practical Tips

Access & Parking – Free car parking is available at both Donard Car Park (near Newcastle) and Trassey Car Park. During the peak summer season a modest charge may apply, and spaces can fill quickly on weekends.

Dog‑friendly – Dogs are allowed on all routes but should be kept on a lead in the higher, exposed sections where wildlife may be present.

Family suitability – The ascent is moderate to strenuous; families with young children should stick to the shorter Trassey route and be prepared for steep, rocky sections.

Safety – The terrain is steep and rocky, with sections of built steps that can become slippery when wet or icy. The Mourne Mountain Rescue Team operates from Newcastle and provides emergency assistance; the service can be reached on 0800 555 555 (verify locally).

Facilities – Aside from parking, there are no permanent facilities on the mountain itself. The summit tower is not open to the public for shelter, and there are no toilets or cafés on the summit. Carry sufficient water, snacks and warm clothing, especially in winter.

Public Transport – Regular Translink bus services run from Belfast to Newcastle; from Newcastle a local taxi or rideshare can take you to Donard or Trassey car parks (approximately 5 km). Direct bus links to the trailheads are limited, so most visitors drive.

Booking the Guided Hike – Reservations can be made through the event page on Eventbrite: Check availability for Slieve Commedagh Hike. For further enquiries, call the organiser at +44 7506 997354 (verify the number before use).

How to Get There

• By car – From Belfast, follow the A2 south to Newcastle (≈30 km). Follow signs to Donard Car Park or Trassey Car Park. Both have ample parking.
• By bus – Translink route 71/71A runs Belfast‑Newcastle; alight at the Newcastle town centre and take a short taxi ride (≈10 min) to the car parks.
• By bike – The coastal cycle route from Newcastle into the Mournes provides a scenic, traffic‑free approach to Donard Forest for experienced cyclists.

Map & Navigation Resources

• OS Explorer Map 29 – Detailed contour lines, wall locations and grid references.
• AllTrails – Download the “Slieve Commedagh – Donard Loop” GPX for offline navigation.
• Komoot – Offers turn‑by‑turn voice navigation and altitude profiles for both the Donard and Trassey approaches.

Nearby Attractions

• Donard Forest – A mixed‑wood forest offering gentle walks and picnic spots before the ascent.
• Silent Valley Reservoir – A short drive north provides a scenic lake and walking routes.
• Newcastle Harbour – Ideal for a post‑hike meal; the town has several cafés and pubs.

Slieve Commedagh offers a blend of natural grandeur, historic intrigue and a genuine sense of achievement. Whether you tackle the full three‑peak loop, a single‑peak ascent, or join a guided group, the mountain rewards you with sweeping vistas, rugged tors and the echo of centuries‑old smuggling routes.