Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

Bike touring routes & trails

Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

Moderate

4.7

(14)

108

riders

Porth Penrhyn Harbour – Old Railway Tunnel loop from Bangor

01:35

24.9km

230m

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

Tips

Includes a segment in which cycling is not permitted

After 8.52 km for 198 m

Waypoints

Start point

Train Station

Get Directions

2.86 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

3.01 km

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

8.50 km

Blas Lôn Las Café

Highlight • Cafe

Accessible from the Lôn Las Ogwen cycle path, over a rollable bridge and a short section on a gravel path to the cafe.

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12.5 km

Caffi Coed-y-Brenin

Highlight • Cafe

cheap and cheerful pitstop

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14.7 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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16.0 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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20.3 km

Afon Cegin

Lake

21.5 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 •

Tip by

24.9 km

End point

Train Station

Way Types & Surfaces

Way Types