9k Run Pontllanfraith: Scenic Journey Through Sirhowy Valley

Route Overview & Local Insights

This 9.0km loop through the Sirhowy Valley offers a fantastic, predominately paved experience for runners looking for a steady effort with just enough elevation to keep things interesting. Starting at Gelligroes, you’ll follow the historic Sirhowy Valley Line, tracing the gentle curves of the river toward Pont Lawrence Rees Lane. With a 49m ascent spread across the route, it is classified as slightly hilly, but the 90% paved surface makes it an ideal choice for a tempo run or a long weekend session. The return leg via the High Street and Bridge Street provides a change of scenery, transitioning from secluded valley trails to the local character of the Pontllanfraith area before finishing back at the start.

The Sirhowy Valley is steeped in South Wales' industrial heritage, and this route follows the bones of the old Sirhowy Railway, which once transported coal and iron down to the coast. Today, the "Great Track" has been reclaimed by nature, transforming into a lush green corridor that serves as a haven for local runners and cyclists alike. As you cross the river and pass through the local settlements, you are traversing a landscape that was once the beating heart of the Industrial Revolution. Running here offers a unique blend of natural beauty and historical significance, providing a peaceful escape through one of the most iconic valleys in Caerphilly County Borough.