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Running trails & routes

Barmouth Bridge – Mawddach Trail loop from Bontddu

Running trails & routes

Barmouth Bridge – Mawddach Trail loop from Bontddu

Hard

62

runners

Barmouth Bridge – Mawddach Trail loop from Bontddu

01:47

16.7km

110m

Running

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Last updated: August 21, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Camping Site

1

542 m

Afon Mawddach

Highlight • Natural Monument

The Afon Mawddach (English: River Mawddach) is a river in Gwynedd, Wales, which has its source in a wide area SH820300 north of Dduallt in Snowdonia. It is 28 miles …

Tip by

2

6.90 km

Barmouth

Highlight • Settlement

3

8.03 km

Barmouth Bridge

Highlight • Cycleway

A single-track railway with a wooden pedestrian walkway alongside, Barmouth Bridge is a particularly awesome viaduct. It stretches across the estuary at Barmouth and provides fantastic views in every direction, …

Tip by

4

8.09 km

Barmouth Viaduct

Highlight • Monument

Barmouth Viaduct is a Grade II* listed single-track wooden railway viaduct across the estuary of the Afon Mawddach near Barmouth, Wales. It is 820 metres long and carries the Cambrian …

Tip by

5

8.17 km

Barmouth Bridge (Mawddach Railway Viaduct)

Highlight • Monument

Grade 2 listed single track wooden railway viaduct with wood cycle path next to the train line. Fantastic views across the Afon Mawddach Estuary.

Tip by

6

8.36 km

Barmouth Viaduct

Highlight • Bridge

Rail and footbridge across the Mawddach estuary. You are requested to pay a small toll to help with the upkeep. £1 for adults and 50p for children.

Tip by

7

11.9 km

Mawddach Trail

Highlight (Segment) • Cycleway

Accessible trail for bikes, pushchairs and wheel chairs with amazing views of the estuary and Barmouth Bridge.

Tip by

8

15.2 km

Mawddach Trail Along the Estuary

Highlight • Trail

B

16.7 km

End point

Camping Site

Way Types & Surfaces

Way Types

12.9 km

2.53 km

1.31 km

< 100 m

Surfaces

12.6 km

1.62 km

1.59 km

912 m

< 100 m

< 100 m

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Elevation

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

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Weather

Powered by Foreca

Sunday 18 October

14°C

4°C

0 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

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