The Afon Marlais is a right-bank tributary of the
Afon Cothi
The Afon Cothi (also known as the River Cothy) in Carmarthenshire is the largest tributary of the River Tywi in south Wales. From its source at Blaen Cothi in the north of the county, north of Pumsaint, it flows south-east and then turns south ...
in
Carmarthenshire
Carmarthenshire (; or informally ') is a Principal areas of Wales, county in the South West Wales, south-west of Wales. The three largest towns are Llanelli, Carmarthen and Ammanford. Carmarthen is the county town and administrative centre. ...
, West
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 on the slopes of Mynydd Llanfihangel-rhos-y-corn and Mynydd Tre-beddau and flows south-eastwards through
Brechfa Forest
The Brechfa Forest is a forest in Carmarthenshire, south Wales.
Brechfa Forest is the 'modern' name for part of the ancient Glyn Cothi Forest. From before records began in the 6th century the communities in the 15 villages which encircle Glyn C ...
before reaching the village of
Brechfa
Brechfa, situated between Llandeilo and Carmarthen in the county of Carmarthenshire, Wales, is a village that has existed since the 6th century at the top of the Cothi Valley. Brechfa village is set in countryside, as well as being located by ...
. After an additional kilometer, it joins the Cothi immediately downstream of Pont Ynys-Brechfa.
References
Rivers of Carmarthenshire
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