As the name suggests (Clettwr is derived from the Welsh for ‘rough water’), this stream is an interesting mix of gorges, riffles, pools and minor falls. The Clettwr runs off the slopes of Cefn Clawdd and enters the Wye at Erwood, 7½ miles south of Builth. For its size it holds a good population of trout and benefits from two Foundation fish-passes.

This is real mountain stream fishing and a challenge to the most hardy. It can be, however, extremely rewarding to those willing to try! Pure escapism, you won’t know the joys of this stream until you have fished it. Go with a small brook rod and be prepared for a climb.

Ideally fished with 6½-7½ft, 2 to 4wt rod.

There was an outbreak of crayfish plague in the lower Irfon on the Wye catchment in July 2024 resulting in the deaths of the many of the native white-clawed crayfish. This beat contains a healthy population of native crayfish therefore, visiting anglers MUST ensure against cross contamination by approved check/dry/disinfection procedures, and importantly waders, nets and tackle should be sprayed with Virkon disinfectant before and after fishing.

Rules and Regulations
  • National bye-laws must be observed and it is up to anglers to familiarise themselves with these.
  • 2 trout can be taken per rod. Anything under 9" must be returned (byelaw)
  • No Dogs Allowed
  • Flyfishing only

Availability & Booking

View this beat's catch returns

View this beat's gallery

Ticket Price Info below If applicable, any booking fee will be included at Checkout
Max number of tickets per day:
2
Block booking price:
£29.00
Trout (River)
Full Day £14.50