Abergwesyn Valley – Claerwen Dam loop from Cilmeri

Hard

riders

Abergwesyn Valley – Claerwen Dam loop from Cilmeri

07:05

107km

1,790m

Gravel riding

Hard gravel ride. 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: September 24, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Nant Irfon National Nature Reserve

Claerwen National Nature Reserve

Elenydd SSSI

Waypoints

Start point

Train Station

Get Directions

20.4 km

Abergwesyn Valley

Highlight (Segment) • Gorge

One of the most beautiful stretches of road in Wales or maybe the world, this valley from Abergwesyn to the well-known and much feared Devil's Staircase is an incredible place …

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40.6 km

View of Strata Florida

Highlight • Trail

Gravel or mountain bike best for the descent down the fire road. Best on a clear day with a few clouds for that dramatic scene,

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46.5 km

Coed Dolgoed

Forest

57.3 km

Gravel Trail Along Claerwen Reservoir

Highlight • Viewpoint

Here it is simply fantastically beautiful!
The trails are sometimes really demanding, sometimes slippery and sometimes so exposed that you have to push your bike a few meters.

Pure adventure, …

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61.7 km

View of Claerwen Reservoir

Highlight • Trail

One of the most beautiful gravel roads I’ve ridden in Wales. Not suitable for road bikes as gravel is pretty rough in places.

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65.3 km

Gravel Path Along Claerwen Reservoir

Highlight • Viewpoint

The Claerwen Reservoir is the largest and the newest of the four Elan Valley Reservoirs. Once you reach the top, another "wow“ experience awaits you!

The view over the huge …

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69.0 km

Claerwen Dam

Highlight • Structure

Lovely views along the Clarewen reservoir & down along the valley. Great in good weather - harsh in inclement weather!

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76.8 km

Caban Coch Dam and Viaduct, Elan Valley

Highlight • Bridge

Made long time ago and still looking stunning

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78.1 km

Caban-Coch Dam and Reservoir

Highlight • Structure

The Caban-Coch Reservoir is one of four reservoirs in the Elan Valley Reservoirs, which supply the city of Birmingham in particular with drinking water. This one is the second largest …

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91.1 km

Ty'n-y-lon Wood

Forest

107 km

End point

Train Station

Way Types & Surfaces

Way Types