Mawddach Trail

A short, mostly traffic-free ride, the Mawddach Trail is a fantastic choice. Follow the former Ruabon to Barmouth railway line from the historic town of Dolgellau to the popular Victorian seaside town of Barmouth, you will love the awe-inspiring views of the Mawddach estuary and nearby Cadair Idris mountain.

Look out for the diverse birdlife in the area, especially as you pass Arthog Bog RSPB reserve which uses one of the former signal boxes as an observation post.


The start of the Mawddach Trail is in Dolgellau, a market town located in Gwynedd, north-west Wales. Dolgellau is the main base for climbers of Cader Idris.

The end of the trail is found in Barmouth, also in Gwynedd, north-west Wales.

Let’s Pedal

The Mawddach Trail starts by the main car park, near the bridge over the river and the Marian playing fields, in Dolgellau.

From there, follow the former railway line for a traffic-free ride and cross the cyclist and pedestrian bridge over the mouth of the estuary into Barmouth.

Head into the town by a short on-road section.

The Mawddach Trail is part of Snowdonia National Park.

Route Distance

FromToDistance (Miles)Distance (Km)


You will find a number of refreshment stops and public houses available on or near the trail:

Dolgellau, Penmaenpool, Barmouth.


Toilets are located at:

Dolgellau, Penmaenpool, Morfa Mawddach, Barmouth.

Cycle Hire available at:


Tourist information available at:

Dolgellau and Barmouth.

How to get here

By Car

The Mawddach Trail is located in Gwynedd, north-west Wales. The start of the trail in Dolgellau is accessible by the A494 from Chester; or the A458 from Shrewsbury or Welshpool.

Car Parking

Pay and Display parking available near the trail at these locations:

Car ParkLocationPostcode
Marian CefnDolgellauLL40 1UU
PenmaenpoolNear DolgellauLL40 1YB
Main Barmouth Car ParkBarmouthLL42 1NF
Jubilee Car ParkBarmouthLL42 1EF

By Cycle

Mawddach Trail is a part of the National Cycle Network (NCN) route 8 from Holyhead to Cardiff.

By Train

Barmouth or Morfa Mawddach.


  • Distance (miles): 9.5
  • Distance (km): 15
  • Start: Dolgellau
  • Finish: Barmouth
  • Type: Disused railway line
  • Surface: Tarmac, gravel
  • Sat Nav: LL40 1UU


  • Car Park
  • Cycle Hire
  • Free Entry
  • Picnic Site
  • Refreshments
  • Toilets
  • Tourist Information

Cycle Hire

Dolgellau Cycles

The Old Furnace
Smithfield Street
LL40 1DF

Opening Times

Open all year round except for any temporary closures due to works.


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The information provided on this page is believed to be correct and is given in good faith. Please be aware that it may have changed since our research. Use of the information on this page is at your risk, we cannot accept any liability for any problems or incidents arising. The maps are based on the postcodes of the centres. The postcode provided for Sat Nav is the nearest postcode to the start of the trail or car park and is therefore not 100% accurate to the entrance of the location. Postcodes are provided as a guide only. We recommend that you confirm the location and other details before travelling.

Cycling With The Kids is not responsible for the content of third party websites, and travel times, prices, routes and providers are correct at the time of writing, but may alter at short notice.

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