Location SD693752, Latitude = 54.172245, Longitude = -2.468833
Length: 5m (estimated)
A short cave in thinly bedded limestone 100m downstream from the waterfall in the west bank above the path. A flat out entrance rises slightly in a small clean washed passage where water appears to emerge from the left from a very narrow bedding obscured by a fallen slab and sinks in a half metre long narrow slot.
Discovered by John Southworth after watching an online video of Thornton Force following Storm Desmond in December 2015.