Wales's largest natural lake — a glacial basin in the upper Dee valley, formed when a moraine dammed the retreating ice-age glacier. The Dee flows in from the Aran mountains and Afon Tryweryn, and out again at the Bala sluices, so this is genuinely part of the river's migration corridor: salmon and sea trout from the wider Dee system do pass through on their way to spawning water above the lake. But that's not what you're fishing for here — Llyn Tegid's own controlled fishery is pike, perch and wild brown trout, plus roach and eels. One species is strictly off-limits: the lake holds the gwyniad, an endemic whitefish found nowhere else on Earth, critically endangered and protected — do not fish for it, and if you hook one by accident, return it immediately. The lake is also Wales's main inland watersports venue, so expect boat traffic sharing the water.
- Lake
- Mixed
