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The Cob Causeway – Porthmadog Harbour loop from Llanfrothen

The Cob Causeway – Porthmadog Harbour loop from Llanfrothen

Easy

5.0

(1)

riders

The Cob Causeway – Porthmadog Harbour loop from Llanfrothen

01:40

40.0km

220m

Road cycling

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride. The starting point of the route is right next to a parking lot.

Last updated: May 27, 2026

Tips

Includes a segment in which cycling is not permitted

After 30.0 km for 155 m

Waypoints

Start point

Parking

Get Directions

2.37 km

Glaslyn Osprey Project Viewing Centre

Highlight • Viewpoint

Bywyd Gwyllt Glaslyn Wildlife (BGGW) is a Registered Charity (1172496) that is managing The Glaslyn Osprey Project at Prenteg near Porthmadog in Gwynedd.
A pair of Ospreys has been breeding …

Tip by

19.3 km

Coed Camlyn

Forest

25.5 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

30.2 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. …

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31.6 km

Porthmadog Harbour Railway Station

Highlight • Structure

The current stone buildings date from 1878/79 and replace earlier wooden buildings that had been dismantled and reused elsewhere on the railway. The goods shed was added in 1880. In …

Translated by Google •

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31.7 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 …

Translated by Google •

Tip by

32.0 km

Porthmadog Harbour Town

Highlight • Viewpoint

Porthmadog is simply a busy hub, a gateway to the Llyn Peninsula and Snowdonia National Park. It is a lovely harbour town with a gorgeous mountain backdrop. It also has …

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32.6 km

Welsh Highland Heritage Railway Station

Highlight • Structure

37.7 km

Glaslyn Ospreys

Highlight • Viewpoint

A pair of ospreys have been breeding in the Glaslyn Valley since 2004. The RSPB operated the first observation center at Pont Croesor from 2005 until a group of local …

Translated by Google •

Tip by

40.0 km

End point

Parking

Way Types & Surfaces

Way Types

26.1 km

10.6 km

2.71 km

338 m

260 m

Surfaces

39.8 km

154 m

< 100 m

Elevation

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

Weather

Thursday 2 July

17°C

8°C

0 %

Additional weather tips

Max wind speed: 28.0 km/h

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The Cob Causeway – Porthmadog Harbour loop from Llanfrothen

Glaslyn Osprey Project Viewing Centre

Pont Briwet Bridge and Estuary

The Cob Causeway

Porthmadog Harbour Railway Station

Porthmadog Harbour

Porthmadog Harbour Town

Welsh Highland Heritage Railway Station

Glaslyn Ospreys

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