Mossdale Caverns

Cave details

10.5 km
Vertical range:
60 m
Northern Dales

A long and extremely difficult cave system dominated by crawling-sized passages, squeezes, ducks, and sumps. The cave is liable to sudden and complete flooding, due to it having the largest stream sink in England. It is infamous for a single flooding incident in 1967 that caused 6 deaths, the most of any single incident in any cave in UK or Ireland. Access to the cave has been officially denied since that incident.