In the heart of the secluded Nantlle Valley, Dorothea Quarry's slate veined pits and deep, dark pools silently remind all who wander by of the region's mining heritage. Six pits remain, the deepest dropping 348 feet (106 m) below the surface. Quarrying ended here in 1970.

The pits constantly needed pumping in order for them to stay dry. In 1904, a Cornish beam engine was installed, which today is a Grade I-listed building. Its operation ceased in 1951, when it was replaced by electrical pumps.

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4.7

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Dorothea Track loop from Y Fron

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

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4.6

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Plas Dorothea Quarry and Ruins – View of Llyn Nantlle loop from Carmel

8.09km

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

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4.7

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#3.

View of Llyn Nantlle – Plas Dorothea Quarry and Ruins loop from Llanllyfni

6.51km

01:56

190m

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

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Elevation 130 m

Weather

Saturday 4 April

9°C

4°C

0 %

Additional weather tips

Max wind speed: 29.0 km/h

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Location: Llanllyfni, Gwynedd, North Wales, Wales, United Kingdom

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Dorothea Quarry and Beam Engine

#1.

Dorothea Track loop from Y Fron

#2.

Plas Dorothea Quarry and Ruins – View of Llyn Nantlle loop from Carmel

#3.

View of Llyn Nantlle – Plas Dorothea Quarry and Ruins loop from Llanllyfni

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