The Afon Dulas, or North Dulas, is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

forming the border between

Merionethshire , HQ= Dolgellau , Government= Merionethshire County Council (1889-1974) , Origin= , Status= , Start= 1284 , End= , Code= MER , CodeName= ...

Gwynedd Gwynedd (; ) is a county and preserved county (latter with differing boundaries; includes the Isle of Anglesey) in the north-west of Wales. It shares borders with Powys, Conwy County Borough, Denbighshire, Anglesey over the Menai Strait, and C ...

and

Montgomeryshire Montgomeryshire, also known as ''Maldwyn'' ( cy, Sir Drefaldwyn meaning "the Shire of Baldwin's town"), is one of thirteen historic counties of Wales, historic counties and a former administrative county of Wales. It is named after its county tow ...

Powys Powys (; ) is a Local government in Wales#Principal areas, county and Preserved counties of Wales, preserved county in Wales. It is named after the Kingdom of Powys which was a Welsh succession of states, successor state, petty kingdom and princi ...

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 ...

. Another river called Afon Dulas joins the Dyfi from the south, upstream of its

confluence In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); o ...

with the North Dulas: locally this is referred to as the South Dulas.

Route of North Dulas

Afon Dulas rises from a source in the hills above

Aberllefenni Aberllefenni is a village in the south of Gwynedd, Wales. It lies in the historic county of Merionethshire/ Sir Feirionnydd, in the valley of the Afon Dulas, and in the Community of Corris. Government The village has a community council. The ...

and passes through

Corris Corris is a village in the county of Gwynedd, Wales, about north of the town of Machynlleth. The village lies on the west bank of the Afon Dulas (which here forms the boundary with Powys), around that river's confluence with the Afon Deri. Its ...

, Esgairgeiliog and

Pantperthog Pantperthog is a hamlet in southern Gwynedd in Wales, 2 miles north of Machynlleth and 14 miles southeast of Dolgellau. Nearby is the former Llwyngwern quarry, which is now the Centre for Alternative Technology. Governance Pantperthog has a ...

before joining the

Afon Dyfi The River Dyfi ( cy, Afon Dyfi; ), also known as the River Dovey (; ), is an approximately long river in Wales. Its large estuary forms the boundary between the counties of Gwynedd and Ceredigion, and its lower reaches have historically been ...

Ffridd Gate Ffridd Gate was a station on the Corris Railway in Merioneth (now Gwynedd), Wales, UK. It was built at the level crossing over the B4404 road to Llanwrin, near the hamlet (place), hamlet of ''Fridd''. A small hamlet also grew up around the stati ...

near

Machynlleth Machynlleth () is a market town, community and electoral ward in Powys, Wales and within the historic boundaries of Montgomeryshire. It is in the Dyfi Valley at the intersection of the A487 and the A489 roads. At the 2001 Census it had a popul ...

History

The Dulas is recorded as an important land boundary in 1200, in a document written in 1428. This document describes the land owned by Einion ap Seisyllt, in the time of

Llywelyn the Great Llywelyn the Great ( cy, Llywelyn Fawr, ; full name Llywelyn mab Iorwerth; c. 117311 April 1240) was a King of Gwynedd in north Wales and eventually " Prince of the Welsh" (in 1228) and "Prince of Wales" (in 1240). By a combination of war and d ...

, as "tota terra inter aquas de Dyfi et Delwas" (Latin, meaning: all the land between the rivers Dyfi and Dulas).

Roads and railways in the Dulas valley

* The A487 trunk road follows the valley from Ffridd Gate to Corris * The Roman road

Sarn Helen Sarn Helen refers to several stretches of Roman road in Wales. The route, which follows a meandering course through central Wales, connects Aberconwy in the north with Carmarthen in the west. Despite its length, academic debate continues as t ...

probably followed the valley from Aberllefenni to Ffridd Gate * The

Corris Railway The Corris Railway ( cy, Rheilffordd Corris) is a narrow gauge preserved railway based in Corris on the border between Merionethshire (now Gwynedd) and Montgomeryshire (now Powys) in Mid-Wales. The line opened in 1859 as a horse tramway, runni ...

ran through the valley from Aberllefenni to Ffridd Gate

Tributaries

* Nant Garfan * Nant Lliwdy south of

* Nant y Darren at Pantperthog * Nant Cwm Cadian north of Pantperthog * Afon Glesyrch at Esgairgeiliog * Nant y Goedwig south of

Maespoeth Junction Maespoeth Junction is a railway location to the south of Corris in Gwynedd. It lies in the historic county of Merionethshire/ Sir Feirionnydd, in the valley of the Afon Dulas. It is known principally as a railway junction on the historic Corris ...

Afon Deri The Afon Deri (sometimes known as the ''Afon Corris'') is a river in Mid Wales. It flows from the eastern flank of Mynydd Ty-Glas down to Corris, where it joins the Afon Dulas that flows south to the Afon Dyfi. The river passes through the vil ...

(formerly known as Afon Corris) at

Afon Llefenni This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

* Nant Llwydiarth at Pont Cymerau, Aberllefenni *

Nant Ceiswyn The Nant Ceiswyn (sometimes known as the ''Afon Ceiswyn'') is a small river in Mid Wales. It flows from the northern flank of Mynydd Dolgoed down to Pont Cymerau, north-east of Aberllefenni. Here it joins the Nant Llwydiarth to form the Afon Dula ...

at Pont Cymerau, Aberllefenni

South Dulas

It rises in Glaslyn, below the slopes of Foel Fadian, and passes the

hamlet ''The Tragedy of Hamlet, Prince of Denmark'', often shortened to ''Hamlet'' (), is a tragedy written by William Shakespeare sometime between 1599 and 1601. It is Shakespeare's longest play, with 29,551 words. Set in Denmark, the play depicts ...

Forge A forge is a type of hearth used for heating metals, or the workplace (smithy) where such a hearth is located. The forge is used by the smith to heat a piece of metal to a temperature at which it becomes easier to shape by forging, or to th ...

and Plas Dolguog before joining the Dyfi. Close to its confluence with the Dyfi it is crossed by the

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

rail line on a bridge known as the Black Bridge. After the line had been repeatedly closed due to flooding after heavy rain, in 2021 it was announced that the bridge and its approaches were to be raised by a metre to try and alleviate the problem. Work began on 15 May and was due to be completed by 28 June.

Tributaries

* Afon Crewi at Felingerrig

References

{{Authority control Dulas Dulas Dulas