Porth Yr Ogof Waterfall Walk
3.7 miles (6 km)This walk visits the cave and waterfalls at Porth yr Ogof, near the village of Ystradfellte on the southern boundary of the Brecon Beacons National Park.
The cave is located on the Afon Mellte at a point where the river travels for a short distance under ground. It's a an intriguing sight, though care must be taken if entering the murky cave.
There is the Cwm Porth car park next to the cave where you can start the walk. From here you can follow a riverside path south towards a series of beautiful waterfalls.... The circular trail visits 4 stunning falls on a series of woodland trails before returning to the car park.
For an alternative walk through the area see the Four Waterfalls Walk page.
Postcode: CF44 9JF
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Porth yr Ogof
Afton Mellte: view downstream from footbridge. The river is shown here about 1km south of the point where it emerges from the cave at Porth-yr-Ogof and a short way above the first of several large waterfalls.
Cavers in Porth-yr-Ogof cave. Porth-yr-Ogof is a very impressive cave insurgence, where the river Mellte travels for a short distance under ground. As it contains a series of easily accessible passages and chambers, this system is the destination of many youth groups and clubs taking young people for their first speleological experience. This is not to say it's not dangerous - most of the cave takes the form of a deep river and has claimed many lives of inexperienced and indeed some experienced visitors over the years.
The Afon Mellte pours out of Porth yr Ogof
Sgŵd Clun Gwyn
Sgwd y Pannwr
Sgwd yr Eira waterfall in winter
Car park picnic area next to the cave.