Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

Bike touring routes & trails

Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

Moderate

4.9

(8)

riders

Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

00:55

14.8km

160m

Cycling

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 27, 2026

Waypoints

Start point

Bus stop

Get Directions

253 m

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, …

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400 m

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.

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2.62 km

Ford Crossing with Footbridge

Highlight • Bridge

The ford can be crossed using the footbridge. The road leading down to the ford from the old rail bridge side is steep. There is also access to a cycle path that runs alongside the river.

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2.89 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.

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7.50 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!

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14.3 km

Cegin Viaduct

Highlight • Bridge

The path from the harbor towards Penrhyn Castle and on to Bethesda is a former railway bed, originally built specifically for the transport of slate from the local quarries. This …

Translated by Google •

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14.8 km

End point

Bus stop

Way Types & Surfaces

Way Types

13.9 km

729 m

193 m

Surfaces

14.8 km