The B4518 road is a road in

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 ...

, central Wales, with a total length of . It begins at in

Rhayader Rhayader (; cy, Rhaeadr Gwy; ) is a market town and community in Powys, Wales, within the historic county of Radnorshire. The town is from the source of the River Wye on Plynlimon, the highest point of the Cambrian Mountains, and is locate ...

near the junction of the

A470 road The A470 (also named the Cardiff to Glan Conwy Trunk Road) is a trunk road in Wales. It is the country's longest road at and links the capital Cardiff on the south coast to Llandudno on the north coast. While previously one had to navigate t ...

and the

A44 road The A44 is a major road in the United Kingdom that runs from Oxford in southern England to Aberystwyth in west Wales. History The original (1923) route of the A44 was Chipping Norton to Aberystwyth. No changes were made to the route of the ...

and leads eventually to the A470 again at

Llanbrynmair Llanbrynmair () is a village, community and electoral ward in Montgomeryshire, Powys, on the A470 road between Caersws and Machynlleth. Llanbrynmair, in area, is the second largest in Powys. In 2011, it had a population of 920. Description The co ...

at . En route going north from Rhayader it passes through the following settlements:

St Harmon St Harmon ( cy, Llanarmon) is a village in Radnorshire, Powys, Wales. The population of the Community at the 2011 census was 593. It is located on the Afon Marteg on the B4518 road running between Llanidloes and Rhayader. The parish church is ...

, Pant-y-Dwr,

Tylwch Tylwch is a small village in Powys, Wales. Tylwch lies south of the principal town of Llanidloes on the border of Montgomeryshire and Radnorshire. It lies on the Afon Dulas The Afon Dulas, or North Dulas, is a river forming the border betw ...

Llanidloes Llanidloes () is a town and community on the A470 and B4518 roads in Powys, within the historic county boundaries of Montgomeryshire ( cy, Sir Drefaldwyn), Wales. The population in 2011 was 2,929, of whom 15% could speak Welsh. It is the third ...

(where it crosses the A470 again),

Staylittle Staylittle ( cy, Penffordd-las), sometimes referred to colloquially as Y Stay or Y Stae, is a small village set in the shallow upland basin of the Afon Clywedog on the B4518 road, equidistant from Llanidloes and Llanbrynmair in the historic cou ...

Pont Crugnant Pont, meaning "bridge" in French, may refer to: Places France * Pont, Côte-d'Or, in the Côte-d'Or ''département'' * Pont-Bellanger, in the Calvados ''département'' * Pont-d'Ouilly, in the Calvados ''département'' * Pont-Farcy, in the Cal ...

, Pennant,

Bont Dolgadfan Bont Dolgadfan is a small village off the B4518 road in Powys, Wales. It is part of the community of Llanbrynmair and forms a community ward for elections to the community council. There are two major estates in Bont Dolgadfan, Dolgadfan itsel ...

Llan Llan may be: * Llan (placename), a Celtic morpheme, or element, common in British placenames ** A short form for any placename . * Llan, Powys, a Welsh village near Llanbrynmair * Llan the Sorcerer La Lunatica Lacuna Lady Bullseye Lady De ...

and

Plas Esgair Plas or Plass may refer to: People * Plas Johnson (born 1931), American saxophonist * Adrian Plass (born 1948), British author who writes primarily Christian humor * Gilbert Plass (1920–2004), Canadian-born physicist * Maria Plass (born 1953), ...

. It passes through the

Clywedog Valley The River Clywedog is a river in Wrexham County Borough, Wales. Its uses have been watering crops, powering industrial machinery but is now used as walking trails or geography trips. The river originates to the west of Wrexham, and joins the ...

and

Clywedog Reservoir The Clywedog Reservoir ( cy, Llyn Clywedog) is a reservoir near Llanidloes, Wales on the head-waters of the River Severn. The construction of the reservoir was enabled by an Act of Parliament which asserted that ''"At certain times the flow of w ...

, built in 1964.

References

Roads in Wales Transport in Powys {{Wales-road-stub