Aberglaslyn, Llyn Dinas and Cwm Bychan walk, Eifionydd

🥾 Walking route

Aberglaslyn, Llyn Dinas and Cwm Bychan walk, Eifionydd

Gwynedd

  • 📏 9.5 km · 5.9 mi
  • ⛰ +367 m
  • ⏱ 2 hr 45 min
  • 🐕 On lead

Walk stats

  • Distance9.5 km · 5.9 mi
  • Elevation+367 m
  • Duration2 hr 45 min
  • DifficultyModerate
  • Route typeCircular
  • TerrainRiverside paths, woodland tracks, rocky mountain ridge and old mine workings
  • Best seasonLate spring to early autumn
  • DogsDog friendly, keep on lead near livestock and mine workings

About this walk

Starting from the village of Beddgelert, this circular walk sets off past St Mary's church and follows the Afon Glaslyn as it threads through the famous Aberglaslyn Pass. The river tumbles between steep, wooded slopes before the route turns inland to climb into the quieter valley of Cwm Bychan.

Here you pass the atmospheric remains of the Cwm Bychan Copper Mine mill and the Nantmor mine workings, industrial relics now softened by moss and mountain grass. The path rises to the rocky ridge of Grib Ddu, opening out wide views across the Snowdonia hills before descending towards the Afon Goth.

The return leg drops past the Sygun Copper Mine and through the woodland of Coed Cae-du, with Llyn Dinas glimpsed below and the legendary hillfort of Dinas Emrys rising nearby. Mynydd Sygyn, Tŵr Bryn Du and Beddau'r Dewiniaid all lie within easy reach, making this a compact but richly varied loop through the heart of Eifionydd.

Route map

Route line drawn from OpenStreetMap footpath data. Numbered markers are waypoints on the route; amber star markers are points of interest a short detour away.

Waypoints along the route

10 waypoints along the way

  • 1

    St Marys

  • 2

    Bedd Gelert

  • 3

    Afon Glaslyn

  • 4

    Cwm Bychan Copper Mine mill

  • 5

    Cwm Bychan

  • 6

    Cwm Bychan (Nantmor) Mine

  • 7

    Grib Ddu

  • 8

    Afon Goth

  • 9

    Sygun Copper Mine

  • 10

    Coed Cae-du

Worth a short detour

Points of interest just off the route, look for the amber markers on the map.

  • Dinas Emrys

    ~237 m off the route

  • Dinas

    ~440 m off the route

  • Mynydd Sygyn

    ~492 m off the route

  • Beddau 'r Dewiniaid

    ~222 m off the route

  • Tŵr Bryn Du

    ~247 m off the route

Route & waypoint data © OpenStreetMap contributors (ODbL).

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Aberglaslyn, Llyn Dinas and Cwm Bychan walk, Eifionydd · Great Scenic Journeys