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Llwyn-onn Reservoir

Merthyr Tydfil · Reservoir

Club water

A compensation reservoir on the Taf Fechan near Cefn-coed-y-cymmer, part of the same Taff valley reservoir chain as Pontsticill and Cantref, holding a stocked trout fishery.

Access: Day tickets via Merthyr Tydfil Angling Association, EA/NRW rod licence required

Last updated: 29 July 2026

Species you can expect

SpeciesBest season
Brown trout Spring, Summer, Autumn
Rainbow trout Spring, Summer
Fishing UK freshwater in England or Wales requires a valid Environment Agency rod licence for anyone aged 13+. Check if you need one and buy online.

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Source: OpenStreetMap contributors

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