River Aln

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Coordinates: 55°23′31″N 2°00′25″W / 55.392°N 2.007°W / 55.392; -2.007

River Aln
River Aln.jpg
The River Aln near Alnmouth
Source of the River Aln is located in Northumberland
Source of the River Aln
Source of the River Aln
 River Aln shown within Northumberland
OS grid reference NT996108
List of places
River Aln
River Aln route map
Castle Pond; Alnham
Castle Farm
Alnham House
Little Ryle
Ryle Mill
Mere Burn
Eslington Park
Callaly Burn
A697, Devil's Causeway, Bridge of Aln, Low Barton
Coe Burn (Lower Learchild)
Shawdon Burn
Bolton Mill
Edlingham Burn
Abberwick Ford
Abberwick Mill
Catcheugh Drive, Hulne Park
East Brizlee Drive, Hulne Park
Eglingham Burn
Shipley Burn
Iron Bridge Drive, Hulne Park
Weir, Hulne Priory
Lady's Well Drive, Hulne Park
B6346, Canongate, Alnwick
B6341, The Peth, Alnwick
B1340, Alnwick
Upstream limit of Aln Anglers' Association fishing
Alnwick Millenium Footbridge
Denwick Burn
A1068, "Alnmouth" Road
Cawledge Burn
Cawledge Viaduct, Aln Valley Railway
Stepping Stones, Old Hawkhill
Bilton Mill
East Coast Main Line Viaduct
Lesbury Weir
Springs Tidal Limit
Lesbury Old Mill
Lesbury Millenium Bridge, A1068
Lesbury Old Bridge
Normal Tidal Limit, and upper limit of Marine Conservation Zone.
Steppey Lane Foot Bridge, Lesbury
Duchess' Bridge, B1338, Alnmouth
Limit of navigation, downstream limit of Aln Anglers' Association fishing,
and upstream limit of public (free) fishing.
End of River Aln — North Sea


The River Aln (pronounced /ˈæln/, or /ˈælən/) runs through the county of Northumberland in England. It rises in Alnham in the Cheviot Hills and discharges into the North Sea at Alnmouth on the east coast of England.

The river gives its name to the town of Alnwick and the villages of Alnmouth and Alnham.[1] For part of its route, directly upstream of Alnwick, the river flows through Hulne Park.


The Aln is first mentioned in the Geography of Ptolemy, a 2nd Century AD Roman cartographer. He refers to it as the River Alaunus (Geographica, on which seems to be situated the town of Alauna (Geographica This can speculatively be identified as the Roman fort at Learchild, where the Devil's Causeway crosses the river.

The Aln is a relatively small river but has been important through history as one of the boundaries along which English and Scottish troops marching to war had to cross; for that reason, it was at times heavily defended. For example, the river flows past Learchild Roman Fort and, more significantly, Alnwick Castle which was built for this purpose.

In two battles at Alnwick the river was a significant element: the first in 1093 between Malcolm III of Scotland and Robert de Mowbray; the second in 1174 between William I of Scotland and Ranulf de Glanville.

Adtwifyrdi is the name used by the Venerable Bede to describe the meeting of river and tributary at the mouth of the River Aln.

Non-Tidal Ecology[edit]

The river has a good run of sea trout and salmon, as well as a population of resident brown trout. Public fishing is controlled by the Aln Anglers' Association.[2] The Aln also has a resident population of otters.[3] Grey heron, barn owls, kestrels and buzzards can be observed hunting along the banks of the river.

Tidal ecology[edit]

Part of the estuary is designated a Site of Special Scientific Interest,[4] and the river below Lesbury footbridge (the normal tidal limit, except on high springs and in surge events) was included in 2013 proposals as a possible marine conservation zone.[5] Large groups of Lapwings, Oyster Catchers and Curlews can often be seen. In smaller numbers are Mallards, Shelducks, Grey Herons, Cormorants, Greylag Geese, Canada Geese, Swans and the occasional family of Goosander. Less often spotted are Barn Owls, Kestrels, Avocets and Little Egrets. Further down the tidal zone a visitor will often see Sandwich Tern and Common Tern, as well as a variety of Gulls and smaller waders including Redshanks, Greenshanks, Turnstones, Ringed Plovers, Pied Wagtails, and other Sandpipers.

See also[edit]