Dinas Cromlech is a striking rock outcrop in the Llanberis Pass, Snowdonia, in Gwynedd, northwest Wales, which a characteristic "open book" shape. It is clearly visible from the road (A4086), and the obvious rock-climbing route up the corner resisted attempts for many years. It was an important venue for a wave of new climbing, for example by Joe Brown (climber): "Cenotaph Corner" (1952, E1, with Doug Belshaw) and "Cemetery Gates" (1951, E1, with Don Whillans).