Pontsarn Blue Pool waterfall walk

The waterfall below the Pontsarn viaduct.

Ability requirements (key)


From Cardiff, take the A470 to the end of Merthyr Tydfil. From Merthyr Tydfil, take the A465 towards Abergavenny, then almost immediately take the first exit. At the staggered junction with the A4054, continue ahead-right towards Pontsticill. After 2 miles, just past an extremely tight hairpin bend, take a lane down to the right. Park on the road side, just before it crosses a bridge, or in a parking area some way past it. SO 0450 0976.


At the bridge, head downstream on the right bank, following the path, to reach the Pontsarn Blue Pool. The path can be followed as far as desired beyond here, through the nature reserve. After some distance, there are a couple of paths leading up to the Taff Trail (such as one just before a weir in the river, 2 km downstream of the waterfall), which runs along the remains of a dismantled railway line.

The Taff Trail can be followed to the right, eventually crossing over the impressive Pontsarn Viaduct. 350 metres beyond there, a path on the left drops down to a footbridge over the river. On the other side, a path beside the river can be followed to the left, passing under the viaduct again, all the way back to the start of the walk. Note that I have not followed this looping route, and have only followed the path a little further than the waterfall itself. Visitors may need to adapt the route as needed.

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More about this area

Whilst every care has been taken in the compilation of this description, neither the author nor his fellow walkers can accept responsibility for loss or injury arising from any errors, omissions or inaccuracies in this description. This description is intended as a guide only, and you should select a route to suit your own abilities, at your own discretion. Ability requirements are a guide only. Route maps are approximated. You follow this description at your own risk.