Sidcot Swallet

Sidcot Swallet is a small cave near Burrington in Somerset, in the Burrington Combe gorge on the Mendip Hills of England. It formed in Carboniferous Limestone and has served as a training ground for first-time cavers for close to a century.

What is Sidcot Swallet?

A swallet is a spot where surface water sinks into the rock. The Mendip Cave Registry lists the system at roughly 206 m long and 28 m deep, with the entrance at about 149 m above sea level. The registry rates it as an easy cave with free access. The name comes from the Sidcot School Speleological Society, a school caving club that explored it in 1925.

Why visit?

After Goatchurch Cavern, it is probably the most popular cave on Mendip for novice parties. It is short but far from dull: narrow passages, squeezes and crawls keep you working. In the furthest reaches, many untouched calcite formations survive, so move carefully and touch nothing.

How do you get there?

The cave lies in the wooded valley of West Twin Brook, close to Goatchurch Cavern. You can also reach the area from above on a path from Black Down, which pairs well with a walk across the surrounding hills. Walking routes through Burrington Combe pass other swallets and caves, so it is easy to fill a whole day. The gorge is reachable by road, with parking nearby.

What should you bring?

Caving here calls for a helmet, your own light (ideally two) and clothes you do not mind covering in mud. Boots with good grip help both on the woodland path and in the tight sections. Beginners should go with an experienced guide or with a group led by a club or commercial provider. Always tell someone where you are going and when you expect to be back.

When is the best time to go?

A swallet reacts to rainfall, so choose a spell of dry weather. After heavy rain water drains into the cave and forest paths turn slippery. Underground temperatures are low and steady, so even in summer a warm layer under your overalls is worthwhile. Allow a few hours: the cave is small, but the walk in and a careful pace through the tight spots take time.

Frequently asked questions

Is Sidcot Swallet suitable for beginners?

Yes. The Mendip registry gives its difficulty as easy, and cavers regard it as one of the most popular sites for newcomers. The tight spots can still be tiring, so go with someone experienced.

How long and deep is it?

About 206 m long and 28 m deep, according to the Mendip Cave Registry.

Where does the name come from?

From the Sidcot School Speleological Society, the school club that explored the cave in 1925.

Is it the same as Bos Swallet?

No. Bos Swallet is a separate cave in Burrington Combe, shorter and deeper, with its own discovery story. Sidcot Swallet lies close to Goatchurch Cavern.