Corn Du summit – Pen y Fan loop from Merthyr Tydfil

Routes

Running trails & routes

Corn Du summit – Pen y Fan loop from Merthyr Tydfil

Hard

runners

Corn Du summit – Pen y Fan loop from Merthyr Tydfil

06:16

52.2km

1,180m

Running

Hard run. Very good fitness required. Mostly paved surfaces. The starting point of the route is accessible with public transport.

Last updated: September 30, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Bannau Brycheiniog National Park

Cwm Taf Fechan Woodlands Site of Special Scientific Interest

Waypoints

Start point

Train Station

Get Directions

23.7 km

View of Bannau Brycheiniog from the Summit Cairn

Highlight • Summit

this is a good spot for a breather and to take in the incredible views

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24.1 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 …

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24.1 km

Corn Du

Highlight • Natural Monument

From the 2,864 feet (873 m) summit of Corn Du, you get spectacular views of Llyn Cwm Llwch directly below and over Wales stretching out below. The trail to this …

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24.1 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. …

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24.7 km

Welsh Mountain Ponies in Bannau Brycheiniog National Park

Highlight • Viewpoint

These Welsh mountain ponies roam freely across the Brecons Beacons and can often be found around the summit of Pen y Fan.

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24.8 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 …

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27.4 km

The Gap Pass (Bwlch ar y Fan), Brecon Beacons National Park

Highlight (Segment) • Viewpoint

Be aware that the surface of this section is really rather tough terrain, and large sections are unrideable with anything short of a full suspension MTB. I attempted this on …

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32.1 km

Taf Fechan Forest

Highlight • Trail

Taf Fechan Forest's extensive reach covers the valley floor to the south of the Central Beacons massif in the Bannau Brycheiniog (Brecon Beacons) National Park. It is named after the …

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