Twll Mawr

United Kingdom / Wales / Caernarfon

Contributors
87 contributions since 23rd December 2020.
TdG
47 contributions since 13th September 2025.
2 contributions since 11th July 2025.

Map

Open in OpenStreetMap Open in Google Maps Open in Apple Maps Open in Bing Maps

Library


Pics + Vids

No pics or vids yet.


Climbs

10 recorded climbs.

Year Climb Grade Climber Style Date
First ascent.

Originally given E6!

First ascent. With Bob Drury.

For god's sake, are you a foothold or not?! [2][3]

Johnny climbed the first 2 pitches on the 10th september and the second two pitches on the 11th september. He later climbed the route in a single push.

References

[1] https://www.youtube.com/watch?v=lLyF8zcP674

[2] Llanberis Slate. United Kingdom: Ground Up, 2011.

[3] Mountain Issue 112, page 18 /library/11111/mountain-112

First ascent.

References

[1] Mountain Issue 112, page 18 /library/11111/mountain-112

1987
1988
1989
1990
1991
First ascent.

With M Thomas

1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010 Slip of the Tongue E6 Pete Robins Lead | worked Nov 2010
First ascent.
First ascent.

I did it on a whim really. We got to the top of the Quarryman groove and I thought what can we do? I’ve done all the existing lines before so I thought I would just go for the traverse line. I got across and suddenly found myself bridging on poor smears, hanging on an edge and having to dyne (sic). At one point I had to sort of layback on the cheek of my face so I could swap hands on a hold. It was very tricky. [1]

Neil Dyer:

It was desperate, we couldn’t really do the moves on the crux. Fair enough we had a sneaky beer on the belay which always takes your edge off, bt still; it was so hard and then run-out after the hard bit was outrageous. Johnny clipped the Fire Escape bolts and then that was it, all the way to the Blockhead belay!”

References

[1] Slate Historical Section

First ascent.
2013
2014
2015
2016
2017
2018
2019
2020
2021
First ascent.
First ascent.

Unusually, Franco used a knotted rope to protect the lower section of the route (before it joins The Meltdown) as he didn't want to place any bolts.

References

[1] https://www.instagram.com/p/Cy3dUaztBFm/

[2] Interview with Rob Greenwood, October 2023 https://www.youtube.com/watch?v=BkWSzo61Lwk

[3] https://ukbouldering.com/board/index.php/topic,33764.msg684096.html#msg684096

Climb Grade # Recorded Ascents Ascents Recorded Between
The Meltdown Direct 9a+ 1 1st April 2022 – 1st May 2022
The Dewin Stone 9a+ 1 26th October 2023
The Meltdown 9a 5 1st January 1985 – 5th June 2023
Climb Grade # Recorded Ascents Ascents Recorded Between
The Quarryman E8 7 10th September 1986 – 26th July 2025
Coeur de Lion E8 3 12th March 1986 – 1st May 2015
The Firé Escape E7 2 22nd September 1986 – 18th June 2024
King of the Mezz E7 1 1st May 2011 – 1st June 2011
Blockhead E7 1 1st January 1992 – 1st January 1993
Slip of the Tongue E6 1 1st November 2010 – 1st December 2010
Opening gambit HVS 1 1st January 1971 – 1st January 1972