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Road cycling routes

Old Railway Tunnel – Porth Penrhyn Harbour loop from Bethesda

Road cycling routes

Old Railway Tunnel – Porth Penrhyn Harbour loop from Bethesda

Easy

5.0

(2)

40

riders

Old Railway Tunnel – Porth Penrhyn Harbour loop from Bethesda

00:49

18.7km

170m

Road cycling

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

Last updated: August 27, 2026

Waypoints

A

Start point

Bus stop

1

2.19 km

Old Railway Tunnel

Highlight • Structure

The road down Steephill is closed at the bottom and there is no way through. Only go down if you want a very challenging climb back up!

Tip by

2

3.44 km

Bangor to Tregarth Railway Path

Highlight (Segment) • Cycleway

Old railway path converted into a bike path. Goes from the South of Bangor down to Tregarth. The surface is compact gravel so perfect for even the fanciest road bikes. Nice to escape the roads for a bit.

Tip by

7.76 km

Afon Cegin

Lake

4

9.20 km

Porth Penrhyn Harbour

Highlight • Structure

Just outside of Bangor, Porth Penrhyn is a pretty harbour on the edge of the Menai Strait. You'll find fishing boats and coastal freight ships moored up here along the dockside as well as lovely views across the water.

Tip by

5

9.36 km

Porth Penrhyn

Highlight • Viewpoint

Here you cross the mouth of the Cegin River into the Menai Strait. Here is Port Penrhyn, once a vital port for the export of slate from the Penrhyn Quarry, …

Translated by Google •

Tip by

B

18.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

17.5 km

606 m

593 m

< 100 m

Surfaces

18.5 km

169 m

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Elevation

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Weather

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Today

Thursday 12 November

8°C

3°C

0 %

Additional weather tips

Max wind speed: 14.0 km/h

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