The Rock Bottom Line
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The Rock Bottom Line (130m, 7b+) at Twll Mawr in the Dinorwig slate quarry in Wales.
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05/10/2011 - Climbing
The Rock Bottom Line, the longest sport climb in the UK In Twll Mawr in the Dinorwig slate quarry in Wales Ian Lloyd-Jones and Sion McGuinness have established The Rock Bottom Line (130m, 7b+).