Mourne GuideExplore · Walk · Belong

Mourne Guide / Slieve Donard via Glen River

Slieve Donard via Glen River.

Climb from Newcastle's woodland to the Mourne Wall and an exposed mountain summit.

The wider Mourne landscape seen from Slieve Donard.

The wider Mourne landscape seen from Slieve Donard. Photo credit & licence

Distance · Approx. return
~9.3 km
Difficulty
Strenuous
Walking time
No estimate available
Total ascent
No estimate available

The walk

Climb from Donard Park beside the Glen River, through woodland and open valley to the saddle with Commedagh. The final ascent follows the Mourne Wall to the summit. Return the same way; this is a very strenuous mountain day.

Underfoot

Forest paths become rough mountain paths with a steep final climb. River crossings and exposed ground require care; avoid the Eagle Rocks cliffs. Mountain navigation and suitable equipment are essential.

Start & access

Start: Donard Park car park, Newcastle. Source grid reference J375305.

Approach Donard Park at the southern end of Newcastle's main street. For parking and toilets, check the route information and local signs before leaving. Keep dogs on leads.

Route map & access at WalkNI — Outdoor Recreation Northern Ireland

Take a suitable map and know how to use it. Check the landowner’s latest access notices before setting out.

Give yourself enough time

Allow for your group’s pace, terrain, stops and daylight. Leave enough time and energy for the return journey.

Sources & walk details

Checked 8 October 2026. Original grade: Very strenuous. Distances rounded for comparison. Where time or ascent is unavailable, no estimate is supplied. A summit height is different from a walk’s total ascent. About the route information.