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Harlech Castle – Porthmadog Harbour loop from Pensarn

Harlech Castle – Porthmadog Harbour loop from Pensarn

Moderate

3.3

(3)

riders

Harlech Castle – Porthmadog Harbour loop from Pensarn

02:46

61.3km

510m

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 13, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Train Station

Get Directions

3.54 km

Harlech Castle

Highlight • Viewpoint

Against stiff competition from Conwy, Caernarfon and Beaumaris, this is probably the most spectacular setting for an Edward I castle in North Wales. All four are recognized as World Heritage Sites.
Harlech was completed from ground to battlements in just seven years under the guidance of the gifted architect Master James of St. George. The classic 'walls within walls' design makes optimal use of the difficult natural defenses.
Even when the castle was completely cut off by Madog ap Llewelyn's rebellion, it held strong – thanks to the 'Way from the Sea'. Via this path of 108 steps, which climbed steeply up the rock face, the besieged defenders could be supplied with food and drink by ship.
Harlech is easier to conquer these days. You can enter this amazing castle via an incredible 'floating' walkway.
(Cadw Wales)

Translated by Google •

Tip by

3.83 km

Bard's Chair Overlooking Harlech Castle

Highlight • Structure

A series of five carved chairs around Harlech. Great idea to get the children outside to find them all, with scan codes at each one for more details. I believe this is number 3 over looking Harlech Castle.

Tip by

14.0 km

Pont Briwet Bridge and Estuary

Highlight • Bridge

Pont Briwet is a road and railway bridge which crosses the River Dwyryd. Built in the 19th century by the Cambrian Railway Company, the bridge is a rare example of a Victorian-era wooden road and rail viaduct. As the bridge was deemed unsafe from 2013, a new bridge was built including a cycle lane.

Tip by

19.6 km

Porthmadog Harbour

Highlight • Settlement

The marina is important to the city and remains a vibrant, vibrant center of activity. Porthmadog has an attractive harbor and attracts sailors and pleasure boaters from all over Europe who are keen to enjoy the beautiful coastline and explore the surrounding countryside. With ample moorings, maritime services and a lively atmosphere, it is one of the most popular moorings in Wales.
(Harbor guides)

Translated by Google •

Tip by

27.5 km

View of Criccieth Beach and Castle

Highlight • Beach

27.9 km

Criccieth Castle, town and seafront

Highlight • Viewpoint

Beautiful small Welsh town with plenty of cafés, a nice sea front, promenade, pebble beach, and a rather obvious 13th century castle overlooking the town.

Tip by

42.2 km

Cariad Gelato

Highlight • Cafe

Awesome Italian style gelato made locally and sold in the shop in Porthmadog or from a cool little kiosk on the sea front in Criccieth. Loads of great flavours that change regularly.
Open 10:30 - 17:30 Mon to Sat and 11:00 - 17:30 on Sunday.

Tip by

42.8 km

The Cob Causeway

Highlight (Segment) • Bridge

This mile-long causeway crosses River Glaslyn as it reaches the estuary. Opened in 1811, this causeway carries the Ffestiniog Railway as well as an A road and a cycle path. Riding along here gives you fantastic views north to Snowdonia’s mountains and across the wetlands of the River Glaslyn. A wall entirely blocks your view south to the estuary, but you won’t care because the mountains are so beautiful from here.

The cycle path is traffic-free so you can easily stop whenever you like to soak up the views.

Tip by

61.3 km

End point

Train Station

Way Types & Surfaces

Way Types

38.9 km

15.2 km

6.10 km

1.00 km

242 m

Surfaces

52.8 km

8.22 km

337 m

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (110 m)

Lowest point (0 m)

Weather

Tuesday 18 August

19°C

14°C

59 %

Additional weather tips

Max wind speed: 20.0 km/h

to get more detailed weather forecasts along your route

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Harlech Castle – Porthmadog Harbour loop from Pensarn

Harlech Castle

Bard's Chair Overlooking Harlech Castle

Pont Briwet Bridge and Estuary

Porthmadog Harbour

View of Criccieth Beach and Castle

Criccieth Castle, town and seafront

Cariad Gelato

The Cob Causeway

Nearby routes

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