Slieve Donard rises above Newcastle and is Northern Ireland’s highest mountain. The Glen River climb leads through woodland to the saddle with Slieve Commedagh, followed by a steep ascent beside the Mourne Wall. Two prehistoric cairns stand on the summit.
- Summit height
- 850 m
Find your bearings
Open in OpenStreetMap ↗See where this place sits in the Mourne landscape before planning your visit.
From the coast to the high ground.
© OpenStreetMap contributors · Map data & privacy
Loading the map connects to OpenStreetMap. Pins show locations, not a walking route or permission to enter.
Planning a walk
Choose a route that suits your group and check access before setting out. Take a current map and know how to use it. Even the lower hills can have rough, steep or exposed ground.
Sources & height notes
DoBIH v18.6 and regional tourism list 850 m; National Trust history says 852 m. Published source values differ. The forecast elevation is a model setting, not a new summit survey.
Locations are based on mapped summit points. For walking directions, use a current map and your chosen route.
Data licence: ODbL 1.0 (combined catalogue); DoBIH fields also CC BY 4.0. Source credits.
The Database of British and Irish Hills v18.6
Checked 2026-10-08: The Database of British and Irish Hills v18.6 · DoBIH v18.6 dataset and CC BY 4.0 licence · OpenStreetMap named peak — Geofabrik snapshot · National Trust — Donard history · WalkNI — Glen River route.