River Aln

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title: "River Aln" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rivers-of-northumberland", "alnwick"] description: "River in Northumberland, England" topic_path: "general/rivers-of-northumberland" source: "https://en.wikipedia.org/wiki/River_Aln" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary River in Northumberland, England ::

::data[format=table title="Infobox river"]

Field	Value
name	River Aln
image	River Aln.jpg
image_caption	The River Aln near Alnmouth
pushpin_map	United Kingdom Northumberland
pushpin_map_caption	Location within Northumberland
subdivision_type1	Country
subdivision_name1	United Kingdom
subdivision_type3	County
subdivision_name3	Northumberland
subdivision_type5	Towns
subdivision_name5	Alnham, Whittingham, Alnwick, Lesbury, Alnmouth
length	40 km
source1_location	Alnham
source1_coordinates
mouth_location	Alnmouth
mouth_coordinates
::

| name = River Aln | name_native = | name_native_lang = | name_other = | name_etymology = | image = River Aln.jpg | image_size = | image_caption = The River Aln near Alnmouth | map = | map_size = | map_caption = | pushpin_map = United Kingdom Northumberland | pushpin_map_size = | pushpin_map_caption= Location within Northumberland | subdivision_type1 = Country | subdivision_name1 = United Kingdom | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = County | subdivision_name3 = Northumberland | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = Towns | subdivision_name5 = Alnham, Whittingham, Alnwick, Lesbury, Alnmouth | length = 40 km | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = | source1_location = Alnham | source1_coordinates= | source1_elevation = | mouth = | mouth_location = Alnmouth | mouth_coordinates = | mouth_elevation = | progression = | river_system = | basin_size = | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = The River Aln () 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. For part of its route, directly upstream of Alnwick, the river flows through Hulne Park.

Etymology

The meaning of the name Aln is uncertain, but it is generally seen as a river-name of the Alaunos or Alaunā. Names of this type could derive from the Celtic root *al- ('feed, raise, nurture') or *alǝ- (to wander'), or else from the Brittonic element **al-*, "shining, bright" (Welsh alaw, 'waterlilly'). Another suggestion is that the name is derived from the Brittonic root *Alaun- (‘holy one’ or ‘mighty one’).

History

The Aln is first mentioned in the Geography of Ptolemy, a 2nd Century AD Roman cartographer. He refers to it as the River Alaunos or Alaunus (Geographica 2.3.4.18), on which seems to be situated the town of Alauna (Geographica 2.3.7.6). 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

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. The Aln also has a resident population of otters. Grey heron, barn owls, kestrels and buzzards can be observed hunting along the banks of the river.

Tidal ecology

Part of the estuary is designated a Site of Special Scientific Interest, and the river below Lesbury footbridge (the normal tidal limit, except on high springs and in surge events) was made a marine conservation zone in 2013. Large groups of lapwings, oystercatchers and curlews can often be seen. In smaller numbers are mallards, shelducks, grey herons, cormorants, greylag geese, Canada geese, mute swans and the occasional family of goosanders. Less often spotted are barn owls, kestrels, avocets and little egrets. Further down the tidal zone a visitor will often see Sandwich terns and common terns, as well as a variety of gulls and smaller waders including redshanks, greenshanks, turnstones, ringed plovers, pied wagtails, and other sandpipers.

References

References

1. "Bridges On The Aln - Introduction".
2. A. L. F. Rivet and Colin Smith, ''The Place Names Of Roman Britain'' (London: Batsford, 1979), pp. 243, 245
3. "A Guide to the Place-Name Evidence".
4. Delamarre, Xavier. (2003). "Dictionnaire de la langue gauloise: Une approche linguistique du vieux-celtique continental". Errance.
5. Field, John. (1980). "Place-names of Great Britain and Ireland". David & Charles.
6. "Fishing - Your Northumberland Guide".
7. "Archived copy".
8. "Natural England - SSSIs : Units for Alnmouth Saltmarsh and Dunes".
9. "Aln Estuary recommended Marine Conservation Zone | the Wildlife Trusts".

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