Lancaster-Ease Gill Cave System

The Caves under and around Ease Gill on the Cumbria/Lancashire of border of the UK form part of the longest and most complex cave system in Britain, the Three Counties System – see the UK longest cave list.

The system extends beneath Casterton, Leck and Ireby Fells around the western and southern flanks of Gregareth Hill, with around 90km of passages. The caves are formed in the Carboniferous (Dinantian) Great Scar Limestone.They contain a wide range of passage types, sediments and speleothems.

The guide lists and describes many of the caves, entrances and routes in this extensive system.