Corn Du summit – Pen y Fan loop from Beacons Reservoir

Hiking trails & Routes

Corn Du summit – Pen y Fan loop from Beacons Reservoir

Hard

4.8

(329)

3,939

hikers

Corn Du summit – Pen y Fan loop from Beacons Reservoir

07:07

20.7km

1,050m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 2, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Bannau Brycheiniog National Park

Waypoints

Start point

Bus stop

Get Directions

815 m

View of Pen y Fan Summit

Highlight • Viewpoint

High elevation trail, good footwear & fitness is a must

Tip by

2.72 km

Corn Du Northwest Ridge

Highlight • Climb

The steep upper section of Corn Du's northwest ridge is the most strenuous part of the hike to its summit for people ascending from the Storey Arms Centre. There are …

Tip by

3.05 km

Corn Du summit

Highlight • Summit

Corn Du is rarely climbed alone, but as a peak added to an expedition to Pen y Fan. The climb up is a great one though and the views from …

Tip by

3.07 km

Col between Corn Du and Pen y Fan

Highlight (Segment) • Mountain Pass

This easy col between Pen Y Fan and Corn Du is a gorgeous easy hill section no more than a few hundred metres long with minimal height gain and loss. …

Tip by

3.64 km

Pen y Fan

Highlight • Summit

Chief of the Brecon Beacons and the highest summit in south Wales, Pen y Fan is a hugely popular peak with routes to the top to suit everyone from first …

Tip by

3.78 km

Jacob's Ladder (Pen y Fan Ascent)

Highlight • Climb

Classic route to the top of Pen Y Fan and a great thigh burner. Made infamous by the SAS as part of their Fan Dance event. It's a great place …

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5.02 km

Cribyn

Peak

5.03 km

View from the east side of Cribyn

Highlight (Segment) • Trail

The hike up Cribyn from the east or in the direction of the Roman Road is one of the best short, sharp hikes in the central range. The path is …

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6.82 km

Fan y Bîg Summit and Diving Board

Highlight • Summit

The Diving Board on Fan y Big is one of the most photographed locations in the Brecon Beacons. The views over towards Cribyn and Pen Y Fan are super good, …

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20.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

7.27 km

6.75 km

5.82 km

700 m

101 m

< 100 m

Surfaces

5.72 km

5.48 km

4.72 km

2.36 km

2.35 km

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (860 m)

Lowest point (420 m)

Weather

Wednesday 7 October

12°C

4°C

-- %

Additional weather tips

Max wind speed: -- km/h

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Comments

August 26, 2024,Pen Y Fan

(In)famous Jacob's Ladder - painful even to look at 🥴

August 13, 2022,Hiking Tour

EverTrek 🙌🏼🏔training. Weekend in Brecon Beacons. Horseshoe

December 26, 2022,beacons 3 peaks horseshoe

Fabulous walk, very rough in places and high winds as usual!

March 8, 2025,Horseshoe Ridge Walk

Such beautiful weather today to explore Pen y Fan!

June 27, 2023,Corn Du – Pen y Fan loop from Llwyn-onn

It all started so well! A little light drizzle but soon changing to horizontal heavy rain and strong gusty wind!
This one picture was taken at the start and the next time we saw anything was when we arrived back. I know that there was stunning scenery out there but it was hiding.
Ended the hike very wet, cold and …

June 7, 2022,Pen Y Fan

Very nice tour through the wild nature over the highest peaks of the Brecon Beacons National Park. The start was a bit sobering, surprisingly many other hikers and despite the forecast of 9 hours of sun and drizzle. At least now we have learned that in Wales it is almost impossible to predict the weather more than an hour in …

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