The Afon Alaw ( en, River Alaw) is a river on

Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ...

(

Welsh Welsh may refer to: Related to Wales * Welsh, referring or related to Wales * Welsh language, a Brittonic Celtic language spoken in Wales * Welsh people People * Welsh (surname) * Sometimes used as a synonym for the ancient Britons (Celtic peop ...

: Ynys Môn) in

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

which rises near

Llanerch-y-medd Llannerch-y-medd, is a small village, community and post town on the Isle of Anglesey in Wales. The Royal Mail postcode is LL71, and it has a population of 1,360, of whom more than 70% is Welsh speaking. The village is situated near the centre ...

and flows northwards into the reservoir of

Llyn Alaw Llyn Alaw (meaning: ''Lily Lake'') is a man-made reservoir on Anglesey, North Wales managed by Dŵr Cymru Welsh Water. It is a shallow lake and was built in 1966. It is a Site of Special Scientific Interest and a destination for over-wintering ...

. Below the dam it then flows southwestwards to the island's west coast near

Llanfachraeth Llanfachraeth is a village and community in Anglesey, Wales. It is located near the west coast of the island, at the head of the Alaw estuary, east of Holyhead, south west of Amlwch and north west of Llangefni. The A5025 road runs through ...

. Its lower reaches, west of the

A5025 road The A5025 is an 'A' road that runs from Llanfairpwllgwyngyll to Valley in Anglesey, Wales. A major road around the north coast of the isle, it runs up the east, north and finally north-west side of the island via several places including Benll ...

, are tidal.Ordnance Survey Landranger map sheet 114 ''Anglesey/Môn''

References

Rivers of Anglesey {{Wales-river-stub