Llyn Cwellyn – Caernarfon Castle loop from Llanrug

Llyn Cwellyn – Caernarfon Castle loop from Llanrug

Moderate

123

riders

Llyn Cwellyn – Caernarfon Castle loop from Llanrug

02:23

49.8km

440m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: August 3, 2026

Tips

Includes a segment in which cycling is not permitted

After 42.5 km for 102 m

Waypoints

Start point

Bus stop

Get Directions

10.1 km

Coed Plas-y-nant

Forest

10.9 km

Llyn Cwellyn

Highlight (Segment) • Natural Monument

Llyn Cwellyn is a reservoir in North Wales which supplies drinking water to parts of Gwynedd and Anglesey. It lies on the Afon Gwyrfai in Nant y Betws between Moel …

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16.3 km

View of Y Wyddfa

Highlight • Other

16.5 km

Drws y Coed Climb

Highlight (Segment) • Climb

A 4.3km climb in Dyffryn Nantlle with a deceptive average gradient of 3.3% with the final section closer to the maximum gradient of 12.4%.

A 4.3km climb in Dyffryn Nantlle …

Translated by Google •

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21.9 km

View of Snowdon (Yr Wyddfa) Across Llyn Nantlle Uchaf

Highlight • Viewpoint

Nantle Valley is well known for its mountains and ridge. A lot of historic settlements and slate mining. Stunning views of Snowdonia. Road surface is good watch out for sheep …

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42.4 km

View of Caernarfon Castle

Highlight • Historical Site

Castell Caernarfon is recognised around the world as one of the greatest buildings of the Middle Ages.

This fortress-palace on the banks of the River Seiont is grouped with Edward …

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42.7 km

Caernarfon Castle

Highlight • Castle

A medieval fortress situated on the on the banks of the River Seiont, Caernarfon Castle has protected Caernarfon since the 11th century. The magnificent castle is open to visitors from …

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43.0 km

Caernarfon Castle

Highlight • Monument

Royal fortress-palace built on legends and bitter medieval conflict Caernarfon Castle is recognised around the world as one of the greatest buildings of the middle ages

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44.0 km

Segontium Roman Fort

Highlight • Historical Site

Built by the Romans in AD 77 on the outskirts of Caernarfon, the Segontium Roman Fort was once the most important military base in North Wales. The Segontium was built …

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49.8 km

End point

Bus stop

Way Types & Surfaces

Way Types