4 - 5
FATMAP difficulty grade
Amid the lumps, bumps and rounded humps that form the ridgelines of the Brecon Beacons, sits Cribyn. It’s the kind of peak a child may draw; pyramidal and stacked with brawn.
Yet in spite of its mountain status, its summit is neither as high nor as insurmountable as you may imagine. The Brecon Beacons comprises an Old Red Sandstone ridge formed over 400 million years ago during the Devonian period.
In the millennia that followed, glacial erosion shaped the landscape that we see today, of steep escarpments to the north and east, banked at their bases with heaps of grey moraine.