The Long Mountain is a hill to the east of Welshpool

Welshpool

Welshpool is a town in Powys, Wales, or ancient county Montgomeryshire, from the Wales-England border. The town is low-lying on the River Severn; the Welsh language name Y Trallwng literally meaning 'the marshy or sinking land'...

 in Powys

Powys

Powys is a local-government county and preserved county in Wales.-Geography:Powys covers the historic counties of Montgomeryshire and Radnorshire, most of Brecknockshire , and a small part of Denbighshire — an area of 5,179 km², making it the largest county in Wales by land area.It is...

, Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

. It rises to a height of 408m at Beacon Ring, where there is a hill fort

Hill fort

A hill fort is a type of earthworks used as a fortified refuge or defended settlement, located to exploit a rise in elevation for defensive advantage. They are typically European and of the Bronze and Iron Ages. Some were used in the post-Roman period...

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The Long Mountain extends from Forden

Forden

Forden is a parish consisting of several settlements near Welshpool in Powys, Wales, historically in the county of Montgomeryshire....

 in the southwest to Vennington in Shropshire

Shropshire

Shropshire is a county in the West Midlands region of England. For Eurostat purposes, the county is a NUTS 3 region and is one of four counties or unitary districts that comprise the "Shropshire and Staffordshire" NUTS 2 region. It borders Wales to the west...

 to the northeast. It is sometimes considered to include the Breidden Hills.

There was a Roman road along the Long Mountain, part of a route from Uriconium (Wroxeter) to Lavobrinta (Forden Gaer). At the southern end of the hill there are traces of Offa's Dyke

Offa's Dyke

Offa's Dyke is a massive linear earthwork, roughly followed by some of the current border between England and Wales. In places, it is up to wide and high. In the 8th century it formed some kind of delineation between the Anglian kingdom of Mercia and the Welsh kingdom of Powys...

, and the Offa's Dyke Path

Offa's Dyke Path

Offa's Dyke Path is a long distance footpath along the Welsh-English border. Opened in 1971, it is one of Britain's premier National Trails and draws walkers from throughout the world...

 traverses the hill.

In 630 the hill was the scene of the Battle of Cefn Digoll

Battle of Cefn Digoll

The Battle of Cefn Digoll, also known as the Battle of the Long Mynd, was a battle fought at Long Mountain near Welshpool, Powys, in 630. The battle was fought between the Northumbrian army of King Edwin of Deira an anti-Northumbrian alliance between King Cadwallon of Gwynedd and Penda of Mercia...

, between Northumbria

Northumbria

Northumbria was a medieval kingdom of the Angles, in what is now Northern England and South-East Scotland, becoming subsequently an earldom in a united Anglo-Saxon kingdom of England. The name reflects the approximate southern limit to the kingdom's territory, the Humber Estuary.Northumbria was...

 and an alliance of Gwynedd

Kingdom of Gwynedd

Gwynedd was one petty kingdom of several Welsh successor states which emerged in 5th-century post-Roman Britain in the Early Middle Ages, and later evolved into a principality during the High Middle Ages. It was based on the former Brythonic tribal lands of the Ordovices, Gangani, and the...

 and Mercia

Mercia

Mercia was one of the kingdoms of the Anglo-Saxon Heptarchy. It was centred on the valley of the River Trent and its tributaries in the region now known as the English Midlands...

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The Long Mountain is a Marilyn

Marilyn (hill)

A Marilyn is a mountain or hill in the United Kingdom, Republic of Ireland or Isle of Man with a relative height of at least 150 metres , regardless of absolute height or other merit...

.