Glen River is a short river in

County Down County Down () is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the traditional thirty-two counties of Ireland. It covers an area of and has a population of 552,261. It borders County Antrim to the ...

Northern Ireland Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...

. The course flows north-east from the foot of

Slieve Commedagh Slieve Commedagh () is a mountain with a height of 767 m (2,516 ft) in County Down, Northern Ireland. After Slieve Donard, it is the second-highest of the Mourne Mountains and the second-highest mountain in Northern Ireland. Slieve Co ...

and

Slieve Donard Slieve Donard ( ; ) is the highest mountain in Northern Ireland, the highest in Ulster, and the seventh-highest in Ireland, with a height of . The highest of the Mourne Mountains, it is near the town of Newcastle on the eastern coast of County ...

in the

Mourne Mountains The Mourne Mountains ( ; ), also called the Mournes or the Mountains of Mourne, are a predominantly granite mountain range in County Down in the south-east of Northern Ireland. They include the highest mountain in all of Ulster, Slieve Donard ...

into Dundrum Bay at

Newcastle Newcastle usually refers to: *Newcastle upon Tyne, a city and metropolitan borough in Tyne and Wear, England, United Kingdom *Newcastle-under-Lyme, a town in Staffordshire, England, United Kingdom *Newcastle, New South Wales, a metropolitan area ...

, descending . It is quite a fast-flowing river with many small waterfalls and deep pools. The bedrock is composed of

granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...

in the upper parts, becoming dark

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

lower down. It flows through

Donard Forest Donard Forest is located near Newcastle, County Down, Northern Ireland. It borders Donard Park at the foot of the Mourne Mountains. The Glen River flows through the forest where it is crossed by three stone bridges. The north east section of t ...

and Donard Park and is crossed by five bridges. The path that runs alongside the river is commonly used by walkers climbing Slieve Donard. There is an unusually prominent ice house beside the river, just before it enters the forest. It was built by the third earl of Annseley in the 1830s to serve his Donard lodge residence. File:The Glen River discharging into Dundrum Bay - geograph.org.uk - 1474496.jpg, The mouth of the river File:The Donard Icehouse - geograph.org.uk - 437617.jpg, The Donard Icehouse

References

Rivers of County Down Newcastle, County Down {{NorthernIreland-river-stub