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

Routes

Bike touring routes & trails

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

Hard

5.0

(4)

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

Start point

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 …

Tip by

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.

Tip by

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 …

Translated by Google •

Tip by

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.

Tip by

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 …

Tip by

33.6 km

End point

Parking

Way Types & Surfaces

Way Types

23.3 km

5.20 km

4.20 km

810 m

138 m

Surfaces

19.4 km

13.9 km

289 m

< 100 m

Elevation

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

Highest point (280 m)

Lowest point (0 m)

Weather

Sunday 31 May

17°C

14°C

-- %

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This route was planned by komoot.

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

02:17h

33.6km

510m

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

Porthmadog Maritime Museum

Rolling Hills in Parc Cenedlaethol Eryri

Harlech Castle

View of Snowdonia National Park

Pont Briwet Bridge and Estuary

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