Approximately 2 miles of double and 1 mile of single bank fishing on the River Irfon at Llanynis some 4 miles from the confluence with the Wye and 3 miles from Builth Wells. The beat averages 30 yards in width and has an excellent variety of water. The wading difficulty also varies - relatively easy in the gravel sections but more difficult over the bedrock. Cefnllysgwynne offers good trout and excellent grayling fishing, with the possibility of occasional salmon later in the season. The Irfon rises and falls quickly after heavy rain, usually being fishable within 24 - 36 hours of a flood.

Exclusivity is not guaranteed, in addition to day tickets, flexible season rods are also available for Cefnllysgwynne, either for the trout season, the winter grayling season or for all year round. Please see here for more details.

Trotting a maggot for grayling is permitted from 1st November to 2nd March.

Excellent self-catering accommodation in a 2 bedroom cottage or a 5 bedroom farm house (sleeping 4 or 10 respectively) is available close to the fishing. Please see Cefnllysgwynne Estate, Builth Wells. for more details.

Half price evening tickets can be purchased after 1pm on the day of fishing. Fishing is allowed from 5pm.

Block Booking is availble on this beat. You can book all the tickets available (sometimes at a discounted price). You can only fish up to the maximum daily number of people allowed for that type of fishing.

Rules and Regulations
  • National bye-laws must be observed and it is up to anglers to familiarise themselves with these.
  • Catch & release for all species
  • Dogs allowed but must be kept under control at all times
  • This Beat operates a Wash-Off Policy
  • Barbless hooks only
  • Fly Fishing only for Trout

Availability & Booking

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Ticket Price Info below If applicable, any booking fee will be included at Checkout
Max number of tickets per day:
Block booking price:
Full Day £22.50
Evening fishing from 5pm onwards £11.25
Trout (River)
Full Day £22.50
Evening fishing from 5pm onwards £11.25
Winter Grayling
Full Day £22.50