Pont Briwet & Harlech Castle loop from Porthmadog — Eryri / Snowdonia National Park

Bike touring routes & trails

Pont Briwet & Harlech Castle loop from Porthmadog — Eryri / Snowdonia National Park

Hard

5.0

(6)

riders

Pont Briwet & Harlech Castle loop from Porthmadog — Eryri / Snowdonia National Park

02:17

33.6km

510m

Cycling

Embark on a challenging touring cycling adventure with the Pont Briwet & Harlech Castle loop from Porthmadog. This difficult 20.9 miles (33.6 km) route takes you through Eryri / Snowdonia National Park, featuring significant climbs totaling 1666 feet (508 metres) of elevation gain, typically completed in about 2 hours and…

Last updated: April 23, 2026

Tips

Includes a segment in which cycling is not permitted

After 70 m for 100 m

Waypoints

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Parking

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126 m

Porthmadog Maritime Museum

Highlight • Monument

Porhmadog is set on the Glaslyn estuary on the very edge of Snowdonia National Park. It is simply the gateway to one of the most incredible and beautiful parts of …

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11.0 km

Rolling Hills in Parc Cenedlaethol Eryri

Highlight (Segment) • Viewpoint

Climb into the village Harlech, then awesome section through a canopy of trees. Rolling hills.

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15.8 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 …

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19.5 km

View of Snowdonia National Park

Highlight • Natural Monument

My favourite view in Wales, looking over Portmeirion and Snowdonia to the north, with the summit of Snowdon in the distance.

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27.1 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 …

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