Ireby Fell Cavern

Ireby Fell Cavern is a limestone cave system beneath Ireby Fell in Lancashire, a short drive from Lancaster and close to the North Yorkshire boundary. It is a destination for experienced cavers rather than casual sightseers.

What is Ireby Fell Cavern?

Explorers found the cave in 1949. Its passages total roughly 4.6 km, and the deepest point lies about 128 m below the surface. It sits on Leck Fell, in the northern Yorkshire Dales, where a dense network of shafts, rifts and underground streams runs beneath open moorland.

The cavern forms one segment of the Three Counties System. It joins the Rift Pot series in the south to Notts Pot in the north. The whole system crosses the borders of Cumbria, Lancashire and North Yorkshire. Since the separate caves were linked in 2011, it has measured about 90 km, with a depth of 253 m, making it one of the longest cave systems in Britain.

What will you see above ground?

Above ground you find open fell: short grass, limestone outcrops and sinkholes where streams disappear. Cave entrances are plain holes or stream sinks with no visitor facilities. The area suits a walk, but only people with proper equipment go underground.

Can you go inside?

This is not a show cave. Entering means vertical caving: rope gear, lighting, a helmet and real underground experience. According to the Council of Northern Caving Clubs (CNCC) listing, the cavern itself needs no separate permit, though visitors should respect the landowner's requests. The neighbouring AKA Hole, which connects to Ireby Fell Cavern, requires an advance online booking, limited to one booking per day. Check the current CNCC rules before you travel.

If you are new to caving, book a trip with a licensed guide to one of the region's easier caves, or join a local club.

How do you get there?

Ireby Fell is a high plateau between the villages of Leck and Ireby. From Lancaster, drive towards Kirkby Lonsdale and continue along narrow lanes onto Leck Fell. Public transport in this area is sparse, so a car is practically essential. The coordinates are about 54.19 N, 2.50 W.

When should you visit?

Weather on the fells changes fast. Late spring to early autumn offers the best conditions for walking. After heavy rain the streams feeding the caves rise sharply, so cavers plan trips around the forecast. In winter the ground is slippery and visibility is poor.

Frequently asked questions

Is Ireby Fell Cavern suitable for beginners? No. It requires caving experience and specialist equipment.

How deep and long is it? About 128 m deep and about 4.6 km long.

Do I need permission? The CNCC lists none for the cavern itself. The nearby AKA Hole requires an online booking. Always check the current rules.

What is it connected to? The Three Counties System, which links Rift Pot with Notts Pot and spans some 56 entrances under three counties.