# World's Deepest Rave

> Roni Size's underground rave at Cwmorthin Slate Mine 1,375 feet below ground.
- Title: World's Deepest Rave · LADbible | Shortify
- Summary: Roni Size's underground rave at Cwmorthin Slate Mine 1,375 feet below ground. Roni Size played a record-breaking underground rave at Cwmorthin Slate Mine…
- Keywords: roni size, cwmorthin slate mine, north wales, 1375 feet, drum and bass, g-shock, gdg-b100 mudman, underground rave, entertainment, culture, news, World's
- Source: LADbible — https://ladbible.com/entertainment/music/worlds-deepest-rave-roni-size-record-attempt-slate-mine-wales-658423-20261017
- Published: 2026-10-23T14:27:13.763+00:00
- Read time: 1 min
- Topics: roni size, cwmorthin slate mine, north wales, 1375 feet, drum and bass, g-shock, gdg-b100 mudman, underground rave, entertainment, culture, news
## The descent
A small group made a treacherous two-hour descent to Cwmorthin Slate Mine 1,375 feet below ground in North Wales.
## Roni Size's set
Roni Size played a drum and bass set 419 metres below ground at Cwmorthin Slate Mine.
## Scientific setup
G-Shock used vibration transducers and hydrophones to capture sound traveling through slate, rock and mud.
## Rave atmosphere
The Welsh national anthem rang out before Roni Size's set began at Cwmorthin Slate Mine.
## Rave preparation
The team took three days to haul all equipment through pitch-black caverns for the underground rave.
## Rave experience
Roni Size's set was preceded by a nod to the surroundings and the Welsh national anthem.
## Rave safety
A protective helmet remained on Roni Size at all times, even in the DJ booth.
## Rave location
Cwmorthin Slate Mine is a 1997-closed slate mine in North Wales.
## Rave significance
This event aims to become the world's deepest underground rave in history.
## Rave outcome
The rave was successfully completed with no injuries after a six-week preparation.
## Key takeaway

Roni Size played a record-breaking underground rave at Cwmorthin Slate Mine 1,375 feet below ground in North Wales.