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Hiking trails & Routes

Clydach Ironworks Tunnel – Clydach Ironworks Ruins loop from Llanelly

Hiking trails & Routes

Clydach Ironworks Tunnel – Clydach Ironworks Ruins loop from Llanelly

Easy

3.3

(3)

21

hikers

Clydach Ironworks Tunnel – Clydach Ironworks Ruins loop from Llanelly

01:44

5.82km

170m

Hiking

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 21, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Cwm Clydach National Nature Reserve

Bannau Brycheiniog National Park

Waypoints

A

Start point

Parking

1

190 m

Clydach Ironworks Tunnel

Highlight • Structure

fancy a long uphill hike?

Tip by

2

458 m

Clydach Ironworks Ruins

Highlight • Structure

Established in the late 18th Century near the site of an earlier works and forge, Clydach Ironworks continued operating until 1884. Sited in a beautiful location rich in industrial archaeology, …

Tip by

3

1.75 km

Llanelli Quarry

Highlight • Historical Site

4

2.38 km

Waterfall in Bannau Brycheiniog National Park

Highlight • Waterfall

5

2.51 km

Disused Railway Tunnel, Bannau Brycheiniog National Park

Highlight • Structure

Headtorch required

Tip by

6

3.10 km

Devil's Bridge and Waterfall

Highlight • Bridge

7

3.10 km

Clydach Gorge Stone Bridge

Highlight • Bridge

The Clydach Gorge is a steep-sided valley in south-east Wales down which the River Clydach flows to the River Usk. It runs for 5.6 kilometres from the vicinity of Brynmawr in Blaenau Gwent eastwards and northeastwards to Gilwern in Monmouthshire.

Tip by

B

5.82 km

End point

Parking

Way Types & Surfaces

Way Types

2.44 km

1.84 km

973 m

558 m

Surfaces

1.87 km

1.57 km

838 m

666 m

436 m

431 m

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Elevation

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

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Weather

Powered by Foreca

Today

Saturday 10 October

13°C

6°C

14 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

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