Moel Penderyn

Moel Penderyn is a hill on the edge of Penderyn village, in the Brecon Beacons National Park in the county borough of Rhondda Cynon Taff, south Wales.

The hill is formed from both Carboniferous Limestone rocks and the overlying Twrch Sandstone (former 'Basal Grit') of the Marros Group (former 'Millstone Grit Series'), also of Carboniferous age.

It lies along the east-northeast to south-southwest aligned Neath Disturbance, a geological structure associated with the Caledonian Orogeny which locally comprises both a major fault and two tight anticlinal folds.

Disused quarries working both limestone and gritstone adorn its eastern and northern sides.

Additional access is provided by a public bridleway along its southern flanks and a public footpath between Penderyn village and the waterfall of Sgwd yr Eira on its northeastern edge.