Porthkerry Viaduct – Porthkerry Viaduct loop from Rhoose Cardiff International Airport

Running trails & routes

Porthkerry Viaduct – Porthkerry Viaduct loop from Rhoose Cardiff International Airport

Hard

runners

Porthkerry Viaduct – Porthkerry Viaduct loop from Rhoose Cardiff International Airport

02:02

18.8km

250m

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 21, 2026

Waypoints

Start point

Train Station

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3.93 km

Porthkerry Viaduct

Highlight • Historical Site

The marvellous 16-arch Porthkerrry Viaduct stands at a whopping 110 feet (33m) high. It was designed and engineered by James and William Szlumper and was originally built to carry coal …

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5.32 km

Cold Knap Roman Site

Highlight • Historical Site

The monument consists of the remains of a Roman rectangular courtyard building dating to the 2nd or 3rd centuries AD.

It is located close to the beach at Cold Knap …

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5.59 km

View of Knap Gardens Marine Lake

Highlight • Lake

5.74 km

The Knap

Highlight • Settlement

I love a duck so stood tall. Lovely area

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9.03 km

Beach

9.67 km

Barry Island Promenade and Beach

Highlight • Beach

Of course it's touristy and commercial - but wonderful to see families out for the day enjoying sand and icecream and all things childhood

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10.4 km

Jackson Bay

Highlight • Viewpoint

This bay is very inset giving a stunning "tunnel" view across the estuary. A wonderful path meanders down and continues across the bay, offering further views onto the bay itself.

Wonderful!

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13.7 km

Porthkerry Viaduct has 16 arches and was eventually re-opened in 1900 after a faltering start when numerous supporting piers settled and had to be underpinned and reconstructed. It's been pretty solid since and now it's a Grade II listed building.

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