Gwaun y Llwyni is a subsidiary summit of Aran Fawddwy in southern Snowdonia, Wales. It forms a part of the Aran mountain range. The peak's southern face is very steep and forms one of the backwalls of Cwm Cywarch. The summit is grassy and is marked by a small cairn. Pen yr Allt Uchaf rises on the other side of Cwm Cywarch, Aran Fawddwy is to the north-east, Waun Camddwr to the north and Glasgwm to the west. It is a UK listed Nuttall.

Clive G

August 7, 2025

Hiking

Outlier summit with great views into the valley.

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1. Summit of Aran Fawddwy – Aran Benllyn loop from Tai-newyddion

17.8km

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960m

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Hard

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2. Aran Fawddwy Cairn – RAF Memorial Stone loop from Tai-newyddion

10.4km

03:52

660m

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

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Moderate

4.5

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3. RAF Memorial Stone – Summit of Aran Fawddwy loop from Tai-newyddion

12.6km

04:43

800m

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

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Moderate

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Informations

Elevation 690 m

Weather

Today

Friday 6 February

6°C

3°C

77 %

Additional weather tips

Max wind speed: 8.0 km/h

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

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Gwaun y Llwyni Summit

1. Summit of Aran Fawddwy – Aran Benllyn loop from Tai-newyddion

2. Aran Fawddwy Cairn – RAF Memorial Stone loop from Tai-newyddion

3. RAF Memorial Stone – Summit of Aran Fawddwy loop from Tai-newyddion

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