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The Walks

Pen y Fan

from Neuadd Reservoir




South Wales

Sub Area:

The Brecon Beacons

Pen y Fan from Cribyn Pen y Fan from Cribyn

OS Map

Start point and OS Grid Reference

Neuadd Reservoir
SO 035173

OS map required


Explorer OL12 : The Brecon Beacons - Western



Landranger 160 : Brecon Beacons


Route Downloads

.pdf format

.gpx format

Mountain Statistics


Summit Height

Summit Grid Reference

Munro/Corbett Number


English Translation

Corn Du

873 m / 2,863 feet

SO 007213


Corn dee

Black Horn

Pen y Fan

886 m / 2,906 feet

SO 012215


Pen e Van

Top of the Beacon


795 m / 2,608 feet

SO 023212




Route Summary

Area/start point on Streetmap - Link to an external site

Route Distance

Total Ascent

Walking Time (approx.) - Click here for an explanation, opens new page

Any Navigation difficulties ?

Any scrambling involved ? - Click here for an explanation, opens new page

Circuit or linear ?

Nature of the walk - Click here for an explanation, opens new page

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12.4 km / 7.75 miles

706 m / 2,315 feet

5 - 6 hours

Care required in poor visibility at Bwlch Duwynt to find correct path to Corn Du



Moderate with some loose rock on descents off Pen y Fan and Cribyn

Route Description


Park your car at the junction of the road and a track just short of the Neuadd Reservoir. There are plenty of places to park along the road and space is not normally a problem so early arrival is not essential.





6.5 kilometres

541 metres

Walk down the road to the Pump House building, turn left here and cross the reservoir's outflow. Once across head half right towards a stile that crosses the fence that surrounds the reservoir. Once over the stile follow the clear path as it climbs, virtually directly up the valley side on ground that is by parts good and boggy. As you reach the top you will see a cutting and the path gains the top of Craig Fan Ddu through this cutting. Turn right and follow the edge of the "summit" plateau climbing gently until the plateau narrows down to a quite narrow ridge. Follow this ridge for a bit over a mile and you will meet the path from Storey Arms coming in from the left. Turn right here and follow the path the short distance to the summit of Corn Du. Keeping the edge on your left walk down to the small bwlch before re-ascending the equally short distance to the summit of Pen y Fan.





2.7 kilometres

153 metres

Descend to the south east down a badly eroded path to a col where there is a junction of paths. Take the left path and begin the climb (the right hand path contours round Cribyn) up to the summit of Cribyn. Descend the other side down a steep path to the col at Bwlch ar y Fan where an obvious track crosses your path.





3.2 kilometres

12 metres

Turn right here and descend down an obvious track past the Upper Reservoir. As you approach a wood you will need to cross some gullies that can be quite boggy after a lot of rain. When you reach the corner of the wood follow the track the short distance back to where you left your car.

Suitability for Dogs

Availability of Drinking Water - Click here for an explanation, opens new page

Unsuitable Terrain (Bog) - Click here for an explanation, opens new page

Unsuitable Terrain (Rock) - Click here for an explanation, opens new page

Awkward Stiles

Other Comments

Not normally an issue on this route

Boggy ground on the ascent and in places on the ridge

No scrambling or awkward/dangerous moves for dogs, no sharp rocks. Can be some loose rock near the edges




30st March 2017

Route description complete.