The River Ithon ( Welsh: Afon Ieithon) is a major left-bank tributary of the

River Wye The River Wye (; ) is the Longest rivers of the United Kingdom, fourth-longest river in the UK, stretching some from its source on Plynlimon in mid Wales to the Severn Estuary. The lower reaches of the river forms part of Wales-England bor ...

Powys Powys ( , ) is a Principal areas of Wales, county and Preserved counties of Wales, preserved county in Wales. It borders Gwynedd, Denbighshire, and Wrexham County Borough, Wrexham to the north; the English Ceremonial counties of England, ceremo ...

, mid

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

. It rises in the broad saddle between the western end of Kerry Hill and the hill of Glog to its west and flows initially southwards to Llanbadarn Fynydd. It then takes a twisting route south via the villages of Llanbister, Llanddewi Ystradenny and Penybont before turning southwest, then doubling back northwards towards Crossgates. From here it resumes a southwesterly course, flowing past

Llandrindod Wells Llandrindod Wells (; ; ; ) is a town and community (Wales), community in Powys, Wales. It serves as the seat of Powys County Council, and is therefore the administrative centre of Powys. The town was Historic counties of Wales, historically in ...

and the site of

Cefnllys Castle Cefnllys Castle (, ) was a medieval spur castle in Radnorshire (now part of Powys), Wales. Two successive masonry castles were built on a ridge above the River Ithon known as Castle Bank () in the thirteenth century, replacing a wooden motte-an ...

to a confluence with the Wye, 1 mile to the south of

Newbridge-on-Wye Newbridge-on-Wye ( ) is a small village in Powys, Wales. It lies, as its name suggests, on the River Wye, just downstream from the market town of Rhayader, and in the community of Llanyre. Location Newbridge-on-Wye is located roughly in the m ...

.Ordnance Survey 1:25,000 scale Explorer map sheets 200 ''Llandrindod Wells & Elan Valley'' and 214 ''Llanidloes & Newtown''

Camddwr

: ''For the tributary of the

River Towy The River Towy (, ; also known as the River Tywi) is one of the longest rivers flowing entirely within Wales. Its total length is . It is noted for its sea trout and salmon fishing. Route The Towy rises within of the source of the River Teif ...

, see Camddwr and for the tributary of the

River Teifi The River Teifi ( ; , ), formerly anglicised as Tivy, forms the boundary for most of its length between the Welsh counties of Ceredigion and Carmarthenshire, and for the final of its total length of , the boundary between Ceredigion and Pembr ...

, see Camddwr, Teifi.'' The Camddwr is a left-bank tributary of the Ithon. It rises in undulating countryside to the east of Llanbister and flows in a generally southwesterly direction to join the Ithon at Abercamddwr.

References

Ithon {{Wales-river-stub