The highest of the Aberystwyth AA waters — five hundred metres up in a glacial cwm on the north flank of Plynlimon, source of the Rheidol itself. Eight hectares of properly remote water with no tarmac access; you walk in. Truly wild brown trout, small and dark from the peat-stained water, and the kind of silence you have to climb for. Bring weather gear.
- Lake
- Ordovician silurian mudstone