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Visiting Snowdonia

Aber Falls Path


Mawddach Trail

This trail is located in the south of Snowdonia National Park and is considered to be one of the best trails in Britain, for cyclists as well as walkers.

It follows the beautiful Mawddach estuary, giving visitors the chance to experience some of Snowdonia’s splendour, striking scenery and beautiful wildlife. The trail stretches for nine miles between Dolgellau and Barmouth and can be joined at several points, including Morfa Mawddach and Penmaenpool (see map).

Mawddach trail follows the track bed of the old railway line from Barmouth to Ruabon. The line was opened in 1865 and proved to be very popular with visitors. The line was also used briefly to carry slate. As cars became more popular, the line became less cost-effective and was closed in 1965.

The trail follows the river Mawddach which has been designated a Site of Special Scientific Interest and a Special Area of Conservation because of the salt marsh and lowland peat habitats.

Important Information!

Look out for any sand blown onto the path after passing over Barmouth Bridge, although the wooden bridge itself is flat and wide.

Between Dolgellau and Morfa Mawddach, the trail is owned by the National Park Authority and for most of its length reaches a 3 metre width.


  • There are accessible toilets Dolgellau, Penmaenpool, Morfa Mawddach and Barmouth.
  • There are several accessible benches and picnic tables along the path.
  • The wide gates are accessible for wheelchairs, pushbikes and pushchairs.

Useful Information

  • If you need any additional information regarding the trail or the area in general, including local transport, please contact Snowdonia National Park Headquarters - 01766 770274 /
  • Are you interested in fishing on the Mawddach? Contact Dolgellau Fishing Society on 01341 422706

Distance: 9 miles - 15km (one way)



Grade: Access for All Walk

Start/Finish: Dolgellau (SH 725 175) or Barmouth (SH 615 155) (It is possible to join the Mawddach Trail at various points between Dolgellau and Barmouth)

Parking: Dolgellau and Barmouth Car Parks ar owned by Gwynedd Council. Summer Charges (March to October) Winter Charges (November to February)

Post Code: Dolgellau LL40 1UU - Bermo LL42 1NF

Relevant Map: OS Ordnans Exp OL23 (Cader Idris & Llyn Tegid)

This map is intended as a rough guide only. You should use the most recent version of the relevant Ordnance Survey map (see above) when walking the route.

Route Details

The Mawddach Trail is clearly marked and can be easily followed. You can join the trail from any of the following locations where there are car parks:

  1. Y Marian, Dolgellau
  2. Pont y Wernddu
  3. Penmaenpool
  4. Arthog
  5. Morfa Mawddach
  6. Barmouth
  • Y Marian, Dolgellau

    Y Marian, Dolgellau (© SNPA)

  • Mawddach Trail, Penmaenpool

    Mawddach Trail, Penmaenpool (© SNPA)

  • Mawddach Trail

    Mawddach Trail (© SNPA)

  • Mawddach Trail

    Mawddach Trail (© SNPA)

  • Mawddach Trail

    Mawddach Trail (© SNPA)

  • Morfa Mawddach

    Morfa Mawddach (© SNPA)

  • Toll Bridge, Barmouth

    Toll Bridge, Barmouth (© SNPA)

Safety Note

Please read our Mountain Safety Advice before venturing out on the mountain.

Please Remember