description Trevone Round Hole Overview
The Round Hole near Trevone Bay in Cornwall, England, is a large, roughly circular opening created by the collapse of the roof of a coastal sea cave. A passage beneath the cliffs connects the cavity to the Atlantic, allowing waves and air to move through it when sea conditions and tides are suitable. It is commonly described as a blowhole, although its broad open form reflects substantial cave-roof collapse. The unfenced or exposed cliff environment requires visitors to remain clear of unstable edges.
help Trevone Round Hole FAQ
Where is the Round Hole near Trevone Bay?
It is on the headland north of Trevone Beach in Cornwall, England. The RNLI describes the collapsed blowhole as just over 24 metres deep, or about 80 feet. [RNLI report](https://rnli.org/news-and-media/2021/july/28/rnli-lifeguards-rescue-woman-stuck-at-the-bottom-of-80ft-blowhole-at-trevone)
How was Trevone Round Hole formed?
The roof of a coastal sea cave collapsed, leaving a large circular opening in the cliff. A passage still connects the cavity with the Atlantic, so waves and compressed air can move through it.
Does Trevone Round Hole erupt like a geyser?
No, it is not geothermal. Atlantic swell entering the cave passage can push water and air upward, but the effect changes with tide and sea conditions.
Can visitors climb down into Trevone Round Hole?
It should be treated as a serious cliff hazard, not as a casual swimming or climbing spot. A 2021 RNLI rescue involved a person who had reached the bottom of the roughly 80-foot blowhole. [RNLI report](https://rnli.org/news-and-media/2021/july/28/rnli-lifeguards-rescue-woman-stuck-at-the-bottom-of-80ft-blowhole-at-trevone)
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