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.

Isaac Kenyon

August 15, 2020

Road cycling

Scenic ride on the road and railway bridges that cross the River Dwyryd

Andy

June 9, 2022

Road cycling

A great cycle path to keep you off the busy roads.

In the know? Log-in to add a tip for other adventurers!

Routes here

Best routes to The Cob Causeway

riders

1. Pont Aberglaslyn & the Causeway loop from Porthmadog — Snowdonia National Park

24.9km

01:07

180m

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

Navigate

Send to Phone

Save

Easy

299

riders

2. The Cob Causeway – Llyn Dinas loop from Porthmadog

78.3km

03:45

930m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

Navigate

Send to Phone

Save

Hard

294

riders

3. The Cob Causeway – Abersoch Village and Harbour loop from Penrhyndeudraeth

77.6km

03:17

510m

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Navigate

Send to Phone

Save

Moderate

Details

Informations

Distance 1.23 km

Uphill 0 m

Weather

Today

Tuesday 3 February

8°C

4°C

80 %

Additional weather tips

Max wind speed: 33.0 km/h

Most visited during

January

February

March

April

May

June

July

August

September

October

November

December

See routes here

Take Me There

Add komoot as a preferred source in your Google results

Add now

Location: Porthmadog, Gwynedd, North Wales, Wales, United Kingdom

Other Popular Places to Check Out

View of Snowdonia Mountains

Cwm Bychan Aerial Ropeway Pylons

Black Rock Sands Beach

Waterfall in Parc Cenedlaethol Eryri

Mynydd Tal-y-Mignedd Summit and Obelisk

Pyg Track (Snowdon)

Nant Peris Valley

Glaslyn Bridge, Beddgelert

View of Moel y Gest

Llyn Llywelyn

Prenteg Climb

Harlech Beach and Dunes

The Cob Causeway

1. Pont Aberglaslyn & the Causeway loop from Porthmadog — Snowdonia National Park

2. The Cob Causeway – Llyn Dinas loop from Porthmadog

3. The Cob Causeway – Abersoch Village and Harbour loop from Penrhyndeudraeth

Other Popular Places to Check Out

We value your privacy ⛰️

We value your privacy ⛰️