Pont Aberglaslyn – The Cob Causeway loop from Llyn Gwynant

Pont Aberglaslyn – The Cob Causeway loop from Llyn Gwynant

Moderate

5.0

(1)

riders

Pont Aberglaslyn – The Cob Causeway loop from Llyn Gwynant

01:57

43.4km

460m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is right next to a parking lot.

Last updated: August 21, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Gwarchodfa Natur Genedlaethol Yr Wyddfa

Parc Cenedlaethol Eryri

Waypoints

Start point

Parking

Get Directions

375 m

View of the Winding Road in Eryri National Park

Highlight • Viewpoint

winding area

Translated by Google •

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4.71 km

Llyn Dinas

Highlight • Natural

Beautiful views across Llyn Dinas from the A498. Snowdon is to the north and the Watkin path starts a little further northeast up the road. Views south up onto Mynydd Llyndy which is managed by the National Trust.

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8.18 km

Caffi Colwyn

Highlight • Cafe

Great cafe situated in Beddgelert. You'll find outdoor seating at the rear, ideal for the summer months.

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10.6 km

Stone Bridge over Afon Glaslyn

Highlight • River

The old bridge over the river or Afon Glaslyn is a great place to pause and watch the water go by. You can see down into the Aberglaslyn gorge with the rocky fisherman's path cutting its way along the opposite bank.
The bridge itself is a grade 2 listed 17th century stone construction.

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10.6 km

Pont Aberglaslyn

Highlight • Viewpoint

The bridge was probably built in the 17th century and then radically rebuilt and widened in 1795-1796. As with many older bridges, folk tales claimed that the bridge was built by the devil or by the Romans (which an investigation by the National Trust described as "very doubtful"). During the reconstruction, a stone was found with the inscription "W M 1656" scratched on it, suggesting that the bridge is at least that old.
Pont Aberglaslyn is located near the downstream end of the Aberglaslyn Pass. Although the location is rocky and the river flows through rapids upstream, it is not far above sea level.
(Wikipedia)

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21.3 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.

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