Mawddach Trail

The Mawddach Trail (Llwybr Mawddach) is a one way route of 15 km / 9 miles between The Marian (Y Marian) in Dolgellau and Barmouth, following the southern shore of the Mawddach estuary. It is not a circular walk, and the official distance is quoted as 15 km even though the mapped line measures slightly under that. Managed by Eryri National Park Authority.

The trail runs along the trackbed of the old Barmouth to Ruabon railway, opened in 1865 and closed in 1965. From Dolgellau the path follows the sandy estuary west past Penmaenpool and Morfa Mawddach, with open water, sand and the surrounding hills in view for much of the way. The finish is the crossing of Barmouth Bridge, a flat, wide wooden railway viaduct about 820 m long and Grade II* listed. The estuary is known for its wildlife and for a long industrial and maritime history.

Graded Easy Access for All and suitable for people of all abilities, including conventional wheelchairs, pushchairs and off road mobility scooters. The surface is largely flat and even with no steps or steep sections, and the way is clearly marked. The route is wide, reaching about 3 m for most of the Dolgellau to Morfa Mawddach section. Comfortable shoes or trainers are enough.

Allow about 6 hours for the full one way walk at an unhurried pace, less if you cover only part of it. Because the route is one way, arrange your return separately before you set out, or plan a there and back walk from one of the access points.

You can join or leave the trail at Y Marian in Dolgellau, Penmaenpool, Morfa Mawddach and Barmouth. Use the designated parking at Y Marian LL40 1DL, Penmaenpool LL40 1YD, Morfa Mawddach LL39 1BQ or Barmouth LL42 1LX, and never block field or residential entrances. Accessible toilets are available at Dolgellau, Penmaenpool, Morfa Mawddach and Barmouth.

The walk is essentially level throughout, so the main considerations are distance and the shared nature of a wide, popular path. After crossing Barmouth Bridge, expect blown sand on the path, which can be loose underfoot and awkward for wheels.

Dogs are welcome on public footpaths and open access land. On public rights of way keep them under close control, and use a short lead near livestock or wildlife. On open access land a lead no longer than 2 m is required from 1 March to 31 July.

Light is softer early or late in the day, which suits the wide estuary views and the long line of Barmouth Bridge. If you want height and a short sharp climb instead of a level estuary walk, Panorama Walk near Barmouth is a separate circular viewpoint route graded hard or strenuous, so it needs a different level of fitness and footwear from this trail.