A big, remote hydro reservoir deep in the Cambrian Mountains — the 'Desert of Wales' — sitting at the head of the River Rheidol scheme, operated by Statkraft. It's genuinely wild-feeling water: 680 acres of exposed upland loch with brown trout running small (typically around half a pound, occasionally larger) and a scattering of small perch. Some sources mention supplemental trout stocking from Statkraft's Cwm Rheidol hatchery further down the scheme; the fishing-guide consensus still brands it a wild fishery, so treat that as an open question rather than settled either way. There's no boat fishing — everything is bank and wading, on soft, occasionally silty margins, in a spot exposed enough that weather can turn quickly. No salmon or sea trout here; those belong to the River Rheidol below the dam cascade, not the reservoir itself.

• Reservoir
• Mixed