- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 54°16'18"N 1°2'26"W
- Eastings/Northings: 462577, 486668
- OS Grid: SE625866
- Mapcode Local: GBR PM51.HD
- Mapcode Global: WHF9K.ZWMG
Location and coordinates are for the approximate centre of Middle Slack within this administrative area.
Geographic features and populated places may cross administrative borders.