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The Cob Causeway – Llyn Cwellyn loop from Beddgelert

The Cob Causeway – Llyn Cwellyn loop from Beddgelert

Hard

riders

The Cob Causeway – Llyn Cwellyn loop from Beddgelert

04:11

89.6km

1,120m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: February 27, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Coedydd Maentwrog National Nature Reserve

Coed Camlyn National Nature Reserve

Gwarchodfa Natur Genedlaethol Yr Wyddfa

Parc Cenedlaethol Eryri

Waypoints

Start point

Bus stop

Get Directions

3.79 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 …

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3.81 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 …

Showing Translation

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14.0 km

Bwlch-y-maen

Mountain Pass

18.1 km

Coed Camlyn

Forest

28.9 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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33.8 km

Coed Tremadog National Nature Reserve

Nature Reserve

45.0 km

View of Beddgelert and the Glaslyn River

Highlight • Viewpoint

Take care in winter months but seeing the area is wonderful watch out for cattle grids

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51.4 km

Llyn Cwellyn

Highlight (Segment) • Natural Monument

Llyn Cwellyn is a reservoir in North Wales which supplies drinking water to parts of Gwynedd and Anglesey. It lies on the Afon Gwyrfai in Nant y Betws between Moel …

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67.1 km

Ruins

72.5 km

Llanberis Pass – Pen-y-Pass Climb

Highlight (Segment) • Climb

Awesome mountain road from Nant Peris in the west to the top of Pen-y-pass in the east. It's a long climb up from Nant Peris or an exciting descent in …

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77.4 km

Pen-y-Pass Ascent from Nant Gwynant

Highlight (Segment) • Viewpoint

Voted one of the ten most iconic climbs in Wales, you have to conquer this climb. It climbs gently enough from Nant Gwynant to the summit of Pen y Pass for approximately 6km.

Translated by Google •

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87.6 km

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.

Tip by

88.1 km

Coed Pant-agored

Forest

89.6 km

End point

Bus stop

Way Types & Surfaces

Way Types

65.3 km

16.1 km

7.16 km

1.10 km

Surfaces

87.1 km

2.57 km

Elevation

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

Highest point (360 m)

Lowest point (0 m)

Weather

Sunday 17 May

11°C

4°C

88 %

Additional weather tips

Max wind speed: 21.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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The Cob Causeway – Llyn Cwellyn loop from Beddgelert

Stone Bridge over Afon Glaslyn

Pont Aberglaslyn

The Cob Causeway

View of Beddgelert and the Glaslyn River

Llyn Cwellyn

Llanberis Pass – Pen-y-Pass Climb

Pen-y-Pass Ascent from Nant Gwynant

Llyn Dinas

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