Llyn Cwmorthin
A good lake for swimming, near Blaenau Ffestiniog.
Llyn Cwm Corsiog & Llyn Clogwyn brith
Two former reservoirs, high up in the mountains above Blaenau Ffestiniog.
Llyn Llydaw
A good lake for swimming, part-way up Snowdon.
Glaslyn (Snowdon)
A deep corrie lake on the path up Snowdon. Crystal clear water.
Moel Siabod Quarry Lake
A deep quarry lake on Moel Siabod.
Llyn y Foel
A shallow lake part-way up Moel Siabod.
Llyn Llagi
A circular moorland lake.
Ffynnon Lloer
A good size lake high up in the Carneddau range.
Llynau Mymbyr
A good lake for swimming and watersports - just west of Capel Curig.
Llyn Geirionydd
A popular woodland lake with parking.
Llyn Gwynant
A large lake good for swimming, easily accessed from the A498.
Llyn Dinas
A good lake for swimming, easy access from the A498.
Llyn Cwmffynnon
A good-size moorland lake on the opposite side of Pen-y-Pass from Snowdon.
Llynau Cerrig-y-myllt
Two small lakes high up on the slopes of Cnicht.
Llyn yr Adar
A peaty moorland lake at about 1800 feet with a small rocky islet in the centre.
Llyn Eiddiw mawr
A large moorland lake in the Rhinog mountains.
Llyn Morwynion
A natural lake in the Rhinog mountains near the Roman Steps. Now used as a reservoir.
Llyn Du
A small lake north of Rhinog Mawr near the Roman Steps.
Llyn Newydd & Llyn Bowydd
Two former reservoirs above Blaenau Ffestiniog.
Llyn Mair
A small lake alongside the B4410 with parking and picnic area.
Bala Lake
Wales' largest lake - 4 miles long and ½ mile wide. Good beach area and facilities. Bala town within walking distance.
Prince of Wales Reservoir
A small lake, formerly a reservoir at the head of the Cwm Pennant valley.
Llyn Hiraethlyn
A moorland lake east of Blaenau Ffestiniog.
Rhaeadr Du
A waterfall and plunge pool in a wooded valley west of Trawsfynydd.
Tal-y-Llyn
A long, but shallow lake beneath Cadair Idris. Parking available in laybys.
Llyn Cau
A very deep, circular lake at about 1500 feet up Cadair Idris.
Llyn-y-Gadair
An oligotrophic lake high up on the Foxes' path up Cadair Idris.
Llyn Cwm Bychan
A scenic lake about 5 miles from Llanbedr. Good base for walking.
Llyn Irddyn
A clear moorland lake on very rough ground, east of Tal-y-Bont.
Llyn Gafr
A small lake on the Foxes' path up Cadair Idris.
Llyn Idwal
A popular lake for swimming, just over ½ mile from the A470.
Llyn Bochlwyd
At a height of 1820 feet, this lake is alongside the path up Glyder Fach.
Fairbourne Blue Lake
An abandoned quarry lake, very popular for swimming. Entrance is via a short tunnel.
Pont Llanelltyd
A popular swim spot, just off the A496 near Dolgellau. A good place to stop for a break on a hot day.
Teifi Pools
Six small lakes - three of which are used as reservoirs - about 20 miles east of Aberystwyth.
Rosebush Quarry
A small quarry lake in mid-Pembrokeshire, on the side of Foel Cwmcerwyn.
Blue Lagoon, Abereiddy
A former slate quarry, connected to the sea and flooded with jumps from the rocks above.