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Clywedog Dam

Lakes

Clywedog Dam

Highlight • Lake

Clywedog Dam

Recommended by 11 hikers out of 12

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Location: Llanidloes Without, Powys, Wales, United Kingdom

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Best Hikes to Clywedog Dam

4.1

(8)

hikers

1. Llyn Clywedog Dam – Yr Allt Summit Path loop from Y Fan

5.30km

01:36

160m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

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2. Llyn Clywedog Dam loop from Y Fan

5.39km

01:40

200m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

5.0

(1)

hikers

3. Clywedog Dam – Clywedog Reservoir loop from Y Fan

11.3km

03:17

290m

Intermediate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Intermediate

Tips

Alex Foxfield

October 22, 2025

Built primarily to regulate the flow of water in the River Severn, the Clywedog Dam is an impressive sight. It's the tallest concrete dam in Britain, at 236 feet (72 m) high, while it's also 750 feet (230 m) wide. There are two marked hiking trails on the reservoir.

Zoe Evans

October 28, 2023

Llyn Clywedog was the Tallest in the British Isle built purposely to control the level of water to help prevent any future flooding from the source of the River Seven. By Building this absolutely incredible huge 6 mile long dam, one that was the tallest in the British isles, which is amazingly huge in actual size all around! This mammoth body of water is solely to take the huge pressure off the constant mass of floods which would fill up and submerge the surrounding valleys! At the foot of the dam there is a remains of a old lead mine! All structures you can see standing still today. HIGHLY RECOMMEND

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Details

Informations

Elevation 310 m

Weather

Today

Tuesday 4 November

13°C

12°C

100 %

If you start your activity now...

Max wind speed: 27.0 km/h

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See hikes here

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Location: Llanidloes Without, Powys, Wales, United Kingdom

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Clywedog Dam

1. Llyn Clywedog Dam – Yr Allt Summit Path loop from Y Fan

2. Llyn Clywedog Dam loop from Y Fan

3. Clywedog Dam – Clywedog Reservoir loop from Y Fan

Other Popular Places to Check Out

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