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Set on the hillside overlooking Ystrad Mynach it is natural Pennant sandstone of a generally firm nature and is a very popular venue for the lower grade climber, and offers some worthwhile boulder problems at the bottom of the crag and on the natural buttresses situated above the crag.

Penallta plan.gif
  1. Scabs
  2. Y-fronts Wall
  3. The Wolery Wall
  4. Buttress 1
  5. Gaz Wall
  6. Big Wow
  7. Buttress 3
  8. Paskins Boulder
  9. Devils in Hell Wall


The crag is situated at Ystrad Mynach and can be seen from the new roundabout, on the Ystrad Mynach to road (A427). When approaching from Ystrad Mynach, pass under the railway bridge (visible from either direction), take the first right after the bridge, (or if coming from Nelson, the left turning just before the bridge) into a housing estate. Take the first left again into Griffith Street and park on a rough road at the end of the street, on the right. A gravel path leads up to the right end of the crag.


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