Cwmorthin is the water Cambrian AA members talk about first — an old slate-valley lake with a genuine claim to fame, a seven-pound-two brown trout taken from it back in 1922 and still cited whenever the club wants to make a point about what's possible here. You won't catch that fish again, obviously, but the stock behind it has stayed strong, and there's a weight of history sitting on this water that the smaller llyns simply don't carry. Fish it on a day with some cloud and a breeze, work the margins where the old quarry spoil meets deeper water, and treat the 1922 fish as folklore worth knowing rather than a target.
- Lake
- Ordovician volcanics
