Pontsarn Viaduct – Pontsarn Viaduct loop from Merthyr Tydfil

Routes

Running trails & routes

Pontsarn Viaduct – Pontsarn Viaduct loop from Merthyr Tydfil

Moderate

runners

Pontsarn Viaduct – Pontsarn Viaduct loop from Merthyr Tydfil

01:35

15.0km

200m

Running

Moderate run. 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 6, 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

Bus stop

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4.02 km

Pontsarn Viaduct

Highlight • Historical Site

Good ride

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4.11 km

Pontsarn Viaduct

Highlight • Monument

Pontsarn Viaduct was built in the 1860s to carry the Brecon and Merthyr Railway over the Taf Fechan river. The viaduct has seven arches and is situated in a very picturesque landscape.

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5.48 km

Taf Trail

Highlight • Cycleway

The full route provides a fantastic mix of terrain and scenery😊

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7.79 km

Pontsticill Reservoir

Highlight • Structure

Pontsticill Reservoir is a great location for its scenic beauty and because it is the start of many hiking and biking trails. There is a nice trail that actually goes …

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7.91 km

Pontsticill Reservoir Dam and Tower

Highlight • Structure

This reservoir is located in the breathtaking Brecon Beacons of Wales. It is part of a series of reservoirs within the Taff Fechan Valley and was constructed between 1923 and …

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10.7 km

View of the Viaduct in Bannau Brycheiniog National Park

Highlight • Bridge

10.7 km

Cefn-Coed Viaduct

Highlight • Viewpoint

It was really amazing to visit such an old structure and to enhance the knowledge about history. Additionally it gives a better view of the whole Merthyr Town which was amazing.

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