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About this place
Fan Bwlch Chwyth is a 603 m hill in the Fforest Fawr range of South Wales, inside Bannau Brycheiniog (Brecon Beacons) National Park in Powys. It suits walkers who want quiet moorland and big skies instead of the queues on Pen y Fan.
Where is Fan Bwlch Chwyth?
The summit sits in the western part of Fforest Fawr, among broad grassy ridges. An Ordnance Survey trig pillar marks the top, around grid reference SN 912217, and walkers' guides place the highest ground a few metres east of it. You may also see the name spelled "Fan Bwlch Chywth", so search both versions when planning.
How do you get there?
Most walkers start near Cray Reservoir, beside the A4067 between Sennybridge and Ystradgynlais. The trailhead sits around SN 896222. Public transport here is very limited, so a car is the practical choice.
Which routes lead to the top?
- Shorter option – about 7 miles (11 km) across open moor to the trig pillar, either out and back or as a loop along the ridge.
- Three-summit round – about 10 miles (16 km), roughly 670 m of climbing and around seven hours on foot. It links Fan Gyhirych (about 725 m), Fan Nedd and Fan Bwlch Chwyth.
- Group outings, including some led by the Ramblers, use the same start and finish on the ridge.
Much of the way follows faint or no paths. Carry an OS map, a compass or a GPS app.
What will you see?
The ridge opens up views across Fforest Fawr, the upper Tawe valley and the higher Bannau Brycheiniog summits, including Fan Fawr (about 734 m) and Fan Brycheiniog (802 m). The scenery is grass, peat and scattered rock. The area lies within Fforest Fawr Geopark, known for its geology and caves.
When should you go?
Late spring to early autumn, on days with clear visibility, gives the best conditions. The terrain is exposed, and in poor weather fog, strong wind and boggy ground make navigation harder. Bring waterproofs, sturdy boots and enough water, as there are no shops or huts along the way.
Frequently asked questions
How high is Fan Bwlch Chwyth?
It stands at about 603 m above sea level.
Is the walk difficult?
There is no scrambling, but the distance, lack of clear paths and changeable weather make it a moderately demanding day.
Where do I start?
At Cray Reservoir off the A4067. From there you climb onto the ridge and continue to the trig pillar.
Are there other summits nearby?
Yes. Fan Gyhirych and Fan Nedd share the same ridge system, and Fan Brycheiniog rises further east.
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