Craig y Fro

Very accessible views over and through a glacial moraine – the remnant of a small glacier which nestled beneath the crags above the road 11,000 years ago.

OS grid ref SN 972209

Possibly the ultimate in roadside experiences of the Ice Age. The A470 has been cut through the mounds of debris (glacial moraine) left behind by the melting ice.  Geologists are still debating the relative importance of landslip and glacial action in forming the landscape features at this site — decide for yourself!


  • Old Red Sandstone (Devonian); Brownstones Formation
  • Quaternary; glacial moraines, landslip?


  • OS Landranger 160, Explorer map OL12
  • Geological — BGS 1:50,000 sheets: 213 ‘Brecon’ & 231 ‘Merthyr Tydfil’


  • Referred to in ‘Classic Landforms’ book (available from National Park information centres)


  • Occasional ice-cream van / burger bar
  • Free car parking in lay-by at SN 972209
  • Entry: free


  • Flat roadside viewpoint

Transport links

  • By car — beside A470
  • By train — nearest stations at Llandovery, Merthyr Tydfil and Abergavenny — see Traveline Cymru
  • By bus — see Traveline CymruX17 & X43 services between Cardiff and Brecon — stops on A470 at nearby Storey Arms & Llwyn y Celyn YH

Other Geopark attractions nearby