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The ‘world’s deepest’ rave will take over an abandoned mine beneath Snowdonia this month

Guests will have to abseil 1,375 feet below the surface to the dancefloor at Cwmorthin Slate Quarry

Amy Houghton
Written by
Amy Houghton
Contributing writer
Entrance to the rave at the Cwmorthin slate mine in Snowdonia
Image: G-Shock | Entrance to the rave at the Cwmorthin slate mine in Snowdonia
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What lengths are you willing to go to for a rave? We’re not talking about packing onto a sweaty London Underground carriage at 1am or traipsing across various Green Belt fields. We’re talking about crossing land and sea for the sake of a good night out. People have taken ferries to remote Scottish islands, travelled hundreds of miles to Iceland’s Westfjords, and trekked to the ancient Jordanian city of Petra just to dance. And this month, ravers will have to abseil far below the ground to experience what claims to be the world’s deepest rave yet.  

For one night only, the abandoned Cwmorthin Slate Quarry in Eryri (Snowdonia) will host an exclusive rave headlined by DJ Roni Size. The dancefloor is 1,375 feet below the surface and is the deepest accessible point in the UK. To get there, revellers will first have to descend a dark staircase, then cross subterranean ravines, zoom down a zip line and abseil down a sheer rock face. 

The rave is free to attend but there are only a certain number of spots up for grabs. If you want to be part of the intimate crowd, you need to apply to the ballot here. It’s open until October 9. The event itself is on Thursday October 15. 

Ahead of the gig, Roni Size said: ‘By the time we’re 1,375 feet underground, everyone there will already have shared an adventure. And how much more could you reflect the environment, than by pumping a set into the mountain, hearing the sound travelling through the slate, rock and mud, and bringing it back into the mix. It's the most underground of underground raves ever.’

The whole thing is being hosted by watch brand G-Shock to promote its new G-SHOCK GDG-B100 MUDMAN, so guests will also get an exclusive look at that before its general release. Enter the ballot here.

ICYMI: How to go to Glastonbury 2027 if you didn’t get tickets. 

Plus: Manchester’s Warehouse Project is taking a fallow year in 2027. 

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