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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

06:17

52.5km

1,180m

Running

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

Last updated: August 18, 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

24.0 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

Tip by

24.3 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

24.3 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 …

Tip by

24.4 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

25.0 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.

Tip by

25.1 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

27.6 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 …

Tip by

32.3 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 …

Tip by

47.4 km

Cwm Taf Fechan Nature Reserve

Nature Reserve

52.5 km

End point

Train Station

Way Types & Surfaces

Way Types

24.8 km

15.8 km

5.13 km

3.31 km

1.69 km

1.62 km

101 m

< 100 m

Surfaces

19.6 km

13.5 km

7.33 km

6.31 km

2.89 km

2.79 km

Elevation

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

Highest point (860 m)

Lowest point (170 m)

Weather

Monday 24 August

24°C

11°C

-- %

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Comments

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Corn Du summit – Pen y Fan loop from Merthyr Tydfil

View of Bannau Brycheiniog from the Summit Cairn

Corn Du summit

Corn Du

Col between Corn Du and Pen y Fan

Welsh Mountain Ponies in Bannau Brycheiniog National Park

Pen y Fan

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

Taf Fechan Forest

Nearby routes

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