The Hole in the Floor shakehole, one of the entrances to Langstroth Pot, on the fell above Yockenthwaite, has had a collapse due to heavy flooding over the past 12 months.
The issue has been flagged up by Bradford-based White Rose Pothole Club. It advises that “extreme care” should be taken when using the route.
A warning has gone out on the club’s website and the danger is also flagged up on the Upper Wharfedale Fell Rescue Association website which carries out rescues both on the fells and in the caves of the area.
A spokesman for the White Rose Pothole Club said: “In the past month two slabs of rock have been cleared from below the entrance that were blocking the passage forward. The rock is fractured here and is being undermined by floodwater.
“Anybody using this entrance to Langstroth Pot please take extra care.”
Source: Craven Herald