- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 57°19'40"N 5°30'12"W
- Eastings/Northings: 189193, 831796
- OS Grid: NG891317
- Mapcode Local: GBR D9SC.3VS
- Mapcode Global: WH0B3.F2HR
Location and coordinates are for the approximate centre of Gleann Udalain within this administrative area.
Geographic features and populated places may cross administrative borders.