At a glance
Natural glacial ribbon lake below Cadair Idris — 1 mile long, clear brown trout fishing (permit required), lakeside walk with Cadair Idris reflections, and Talyllyn Railway terminus at Abergynolwyn 1 mile away. Minffordd Path to Cadair Idris starts 3 miles east. Uncommonly peaceful. LL36 9AJ.
About Tal-y-llyn
Tal-y-llyn occupies the floor of the Dysynni Valley below the northeastern face of Cadair Idris — a glacial ribbon lake about 1 mile long, narrow, and remarkably clear, with the great ridge of the mountain rising steeply from the far shore and the valley opening westward towards the sea at Tywyn. In calm conditions, the reflections of the Cadair Idris ridgeline in the lake surface are among the most beautiful views in southern Snowdonia. The lake has a contemplative quality quite different from the more dramatic mountain lakes of northern Snowdonia — the surrounding landscape is gentler, the valley wooded, and the sense of solitude real even in the summer months.
The lake is renowned among anglers. Wild brown trout reach notable size in its clear, cold, insect-rich water; permit fishing from boats has been the principal sporting use of the lake for well over a century. The Tyn-y-cornel Hotel at the lake head has been the traditional base for fishing guests. Permits and boat hire are available from local sources; the Tal-y-llyn Angling Association manages the fishing.
The Talyllyn Railway — the world's first preserved railway, saved from closure by volunteer enthusiasts in 1951 — runs up the Dysynni Valley from Tywyn on the coast to Abergynolwyn, 1 mile from the lake foot. The journey by steam train up the valley, followed by a walk to the lake and Cadair Idris views, is one of the classic half-days in southern Snowdonia. The Minffordd Path to the Cadair Idris summit begins 3 miles east along the valley road.
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Frequently asked questions
Tal-y-llyn (the name means "head of the lake" or sometimes "lake end" in Welsh) is a glacial ribbon lake that occupies the floor of the Dysynni Valley at the foot of Cadair Idris — the great mountain of southern Snowdonia. The lake is about 1 mile long, narrow, and remarkably clear, with the northeastern face of Cadair Idris rising steeply from the far shore and the valley opening northward and westward towards the sea at Tywyn. It has a rare combination of stillness and mountain drama — the reflections of the Cadair Idris ridgeline in calm morning conditions are among the most beautiful lake views in Wales. The lake gives its name to the Talyllyn Railway, which runs along the valley below.
Tal-y-llyn is one of the most celebrated natural trout fishing lakes in Wales. The lake holds wild brown trout that are notably large for a natural Welsh lake — fish of 2–3 pounds are not unusual, and larger specimens have been caught. The clear, cold, oxygen-rich water and the insect life on the lake surface support good fly fishing from boats. Fishing is managed by the Tal-y-llyn Angling Association; permits and boat hire are available locally. The season runs approximately March to September. The hotel at the head of the lake (Tyn-y-cornel Hotel) has traditionally been the base for fishing guests, and the combination of the hotel, the lake, and the Talyllyn Railway has made this one of the most traditional Welsh angling destinations for over a century.
The Talyllyn Railway — the world's first preserved railway, saved from closure by enthusiasts in 1951 — runs from Tywyn on the Cambrian Coast up the Dysynni Valley to its terminus at Abergynolwyn, approximately 1 mile from the foot of Tal-y-llyn lake. The railway was originally built in 1866 to carry slate from the Bryn Eglwys quarry above Abergynolwyn to the coast at Tywyn. The slate gauge (2 ft 3 in) is characteristic of narrow-gauge Welsh industrial railways. The railway does not reach the lakeside directly; from Abergynolwyn station, a walk or short drive along the valley road gives access to the lake. The combination of steam train journey and lakeside walk has been a popular excursion from Tywyn for over 50 years.
The lakeside path runs along the northern shore of Tal-y-llyn, giving good views across the water to the Cadair Idris face. The most demanding walk from the lake uses the Minffordd Path — one of the standard routes up Cadair Idris — which starts from the car park at Minffordd, 3 miles east along the valley road from the lake. The Minffordd Path is considered the most dramatic approach to Cadair Idris, ascending steeply through woodland and cwm to the ridge. From Abergynolwyn (1 mile from the lake), the Nant Gwernol forest walk gives easier woodland walking without the mountain ascent. The Dysynni Valley road also gives access to the Dysynni gorge and the Bird Rock (Craig yr Aderyn), 4 miles north-west — an inland cliff used by nesting cormorants.
Tal-y-llyn is a natural lake with no formal prohibition on swimming, but it is not primarily a wild swimming destination. The lake is cold (mountain-fed, clear water), and the angling community using it means that swimmers would need to be considerate of boat traffic and fishing areas. The lake is not managed for swimming and has no designated swimming area or safety provision. The Dyfi Estuary area and the coast near Aberdyfi are more natural choices for swimming in this part of Wales. Wild swimming enthusiasts in the southern Snowdonia area more typically use the upper pools on the Afon Glaslyn (north of Beddgelert) or designated sites on the coast.