Rockfax Description
Desperate climbing up the thin and technical slabby arete. It features a unique rockover that turns into a knee-bar low down, then a sustained fingery arete above. © Rockfax

UKC Logbook Description
Climbs the slabby Arête on the South Wall of Twll Mawr behind the collapsed quarry building (on the same level as the main access tunnels). Climb the left hand slabby Arete (right of the trad crack 'Booooom, Blast & Ruin' VS 4c). Climb the thin and technical arête, 9 bolts protect. See if you can find the high stepping rock over that turns into a knee bar low down, before tackling the thin and sustained arête above. Lower off on the pedestal ledge above.

NOTE: If you've enjoyed any of the bolted routes in Twll Mawr please consider donating to the North Wales Bolt Fund :-)

Ian Lloyd-Jones 04/Jul/2013.


Slate Arêtes (sport) , All the Llanberis SLATE sport @ 7b & 7b+ , Slate Sport , Rarely repeated Slate Sport 7's , Twll Mawr Big Wall 1000 Metre Challenge! , Sl@teheads Sl@te


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High 7b+
Mid 7b+
Low 7b+
High 7b
Mid 7b
Low 7b
High 7a+
Mid 7a+
Low 7a+
Route of Interest
Beasley Street

Grade: 7b ***
(Tyddyn Hywel Quarry)

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