Slieve Donard

Slieve Donard is the highest peak in the Mourne Mountains and in Northern Ireland, rising to about 850 metres above sea level near the county coast. It dominates the skyline above the seaside town of Newcastle and is a frequent target for hillwalkers.

Popular routes include the Glen River / Donard Glen approach from the Newcastle side and steeper ridges from neighbouring valleys; most round trips from the valley take a few hours and are waymarked. The summit offers panoramic coastal and inland views on clear days and is crossed by the Mourne Wall, a prominent stone enclosure that links several of the range’s peaks.

The mountain takes its name from Saint Donard (Domangart), and the massif has been used for grazing and limited upland management for centuries. The Mourne Wall that crosses the area was constructed in the early 20th century to protect water catchments and remains a notable landscape feature.

Slieve Donard sits above the town of Newcastle on County Down’s coastal fringe, within the Mourne Mountains and roughly an hour’s drive south of Belfast depending on traffic. The area is upland moor and granite ridgeline terrain with valley access from the coast.

• Height and hike time: Summit altitude is about 850 metres, and typical footpaths take several hours round trip from the valley car parks near Newcastle.
• Safety note: Weather can change rapidly at elevation; many walkers use marked paths and carry basic navigation and waterproof gear outside summer months.

What to See #

• Summit: The mountain summit reaches approximately 850 metres above sea level and forms the highest point in County Down and the Mourne Mountains.
• Donard Glen route: A network of walking routes ascends from the coastal town of Newcastle, with one of the most-used approaches following the Glen River / Donard Glen valley.
• Mourne Wall: A dry-stone barrier known as the Mourne Wall crosses several peaks in the range and runs close to the summit, built in the early 20th century to enclose upland catchments.