- Category: Water Feature
- Type: Island
- Latitude/Longitude: 56°33'15"N 5°27'3"W
- Eastings/Northings: 188003, 745594
- OS Grid: NM880455
- Mapcode Local: GBR DCXD.9Y8
- Mapcode Global: WH0FT.7JJ8
Location and coordinates are for the approximate centre of Eilean Trenach within this administrative area.
Geographic features and populated places may cross administrative borders.