A major upper Wye tributary, the Irfon starts on the slopes of Bryn Garw flowing in a southerly direction towards
Llanwrtyd Wells, through the secluded valleys of a National Nature Reserve before turning east through Llangammarch Wells to join the main river at Builth.
The Irfon holds good numbers of trout at a good average size, but nowadays is probably best known for its late summer and autumn grayling fishing, the best of which can be found below Llanwrtyd Wells. There is also a chance for a late season salmon particularly in the lower reaches. The Irfon is a predominantly fast flowing bedrock dominated river, interspersed with gravel runs and deep pools.
The Ithon is the other major upper Wye tributary flowing out of the Radnorshire Forest into the main river near Newbridge-on-Wye. This medium-sized river is host to a number of fish species although it is probably grayling and trout fishing that it is best known for. Much of the Ithon flows leisurely over gravel and combined with open banks, this makes large sections of it some of the easiest to access fishing in the Wye catchment.
There is no right of navigation on either river and no access arrangements in place. Should you encounter any canoeists, please ask them to leave and not continue. We would be grateful if you could also inform us of the incident.