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Llwyn On Reservoir - Fishing in Wales

Llwyn On Reservoir

Llwyn On Reservoir, also referred to as Llwyn Onn, is the lowest reservoir in the Cwmtaf valley, the one nearest Merthyr Tydfil, on the A470 between Merthyr Tydfil and Brecon. At 150 acres in size, Llwyn On is the largest of the three reservoirs in the Taff valley.

It is well stocked with rainbow trout, good numbers of wild browns also being present. Fly, spinning and worming are permitted.

Fishing is controlled by Welsh Water and day tickets are available online or by telephone with the Fishing Passport.

There is a closed season. The reservoir opens at the end of March, usually the last weekend of the month (i.e 28th March 2022) then the season runs to 30th October. Check on the Fishing Passport website for details.

Image © Gareth James and licensed for reuse under Creative Commons Licence.

Llwyn On Reservoir

Address Cwmtaf
Merthyr Tydfil
CF48 2HU

Book Fishing Online

Click the link below to book fishing with the Fishing Passport

Redirecting you to Fishing Passport

Species at this location

Brown trout

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Rainbow trout

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