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Solway Firth
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Key Information

The Solway Firth[a] is an inlet on the west coast of Great Britain, forming part of the border between England and Scotland.[b] The firth (a Scottish term for an inlet of the sea) divides Cumbria (including the Solway Plain) from Dumfries and Galloway. The Isle of Man is also very near to the firth. The firth comprises part of the Irish Sea.
The firth's coastline is characterised by lowland hills and small mountains. It is a mainly rural area, with mostly small villages and settlements (such as Powfoot). Fishing, hill farming, and some arable farming play a large part in the local economy, although tourism is increasing.
The northern part of the English coast of the Solway Firth was designated as an Area of Outstanding Natural Beauty, known as the Solway Coast, in 1964.[1] Construction of the Robin Rigg Wind Farm in the firth began in 2007.
Within the firth, there are some salt marshes and mud flats that can be dangerous, due to their frequently shifting patches of quicksand.
Wildlife
[edit]There are over 290 square kilometres (110 sq mi) of Sites of Special Scientific Interest (SSSIs) in the area of the firth (one of which is Salta Moss), as well as national nature reserves — at Caerlaverock and in Cumbria.[2][3] On the Cumbrian side, much of the coastline has been designated an Area of Outstanding Natural Beauty (AONB). The Solway Coast’s AONB has two separate sections: the first runs westward from just north of Carlisle to Skinburness; the second runs south from the hamlet of Beckfoot, past Mawbray and Allonby, to Crosscanonby.
In 2013, the honeycomb worm and blue mussel were designated as targets of conservation efforts, and Allonby Bay (an inlet of the Solway Firth) was put forward as a candidate for a Marine Conservation Zone.[4][5]
Long-distance walking route
[edit]A 53-mile (85 km) long-distance walking route, the Annandale Way,[6] runs through Annandale, from the source of the River Annan, in the Moffat Hills, to the Solway Firth; it was opened in September 2009.[7]
Islands in the Solway
[edit]Unlike other parts of the west coast of Scotland, the Solway Firth has only a few islands. They are:
- Hestan Island
- Rough Island
- Little Ross
- The so-called Isle of Whithorn (which is actually a peninsula)
- The Islands of Fleet
Rivers
[edit]The Solway Firth is the estuary of the River Eden and the River Esk.
Below are links to lists of the other rivers that flow into the firth:
History
[edit]

The name "Solway" (recorded as Sulewad in 1218) is of Scandinavian origin,[8] and was originally the name of a ford across the mud flats at Eskmouth.[9] The first element of the name is probably from the Old Norse word súl 'pillar', referring to the Lochmaben Stane, though it may instead be from súla, meaning 'solan goose'.[8] Súl and súla both have long vowels, but the early spellings of Solway indicate a short vowel in the first element.[9] This may be due to the shortening of an originally long vowel in the Middle English period but may also represent an original short vowel.[9] If this is the case, the first element may be *sulr, an unrecorded word cognate with Old English sol 'muddy, pool', or a derivative of sulla, meaning 'to swill'.[9]
The second element of the name is from the Old Norse vað, meaning 'ford'[8] (which is cognate with the modern English word wade).
The area had three fords: the Annan or Bowness Wath, the Dornock Wath (once called the Sandywathe), and the main one —the Solewath (also called the Solewath or the Sulewad).
A wooden lighthouse was built in 1841 at Barnkirk Point (grid reference NY 1903 6425). It was destroyed by fire in 1960.[10]
On 9 March 1876, a 79-ton French lugger St. Pierre, was stranded - and finally declared lost - on Blackshaw Bank, an ill-defined feature which extends for a considerable distance on both sides of the channel of the River Nith.[11]
Between 1869 and 1921, the estuary was crossed by the Solway Junction Railway on a 1780 m (5850 ft) iron viaduct.[12] The line was built to carry iron ore from the Whitehaven area to Lanarkshire and was financed and operated by the Caledonian Railway of Scotland. After the railway, which was not a financial success, ceased operating in 1921, the railway bridge became a popular footpath, enabling residents of Scotland to easily cross into England, where alcoholic drink was legally available seven days a week. (Scotland was dry on Sundays at the time.) The viaduct was demolished between 1931 and 1933.
Margaret Wilson was a Scottish Covenanter who was executed by drowning in the Solway Firth in 1685. She was tied to a stake in the water and left to drown with the incoming tide. Margaret Wilson lived during a time of great turmoil in Scotland, with the Covenanter movement opposing the episcopalian governance of the Church of Scotland. The Covenanters sought to maintain their Presbyterian faith and resist the authority of the monarch.
John Everett Millais created an illustration, a wood engraving, depicting the Scottish martyr Margaret Wilson, tied to a stake in the surf at Solway, because, as a Covenanter, refusing to acknowledge James II as head of the church.[13] It was engraved by the workshop of Joseph Swain and published in Once a Week in 1862.[14][15] Of further interest is John Everett Millais' painting, ;The Knight Errant (1870) original section was later sewn into another canvas and exhibited in 1872 as The Martyr of The Solway (Walker Art Gallery, Liverpool; plate), which is similar to the woodcut noted here.

The Ministry of Defence had by 1999 fired more than 6,350 depleted uranium rounds into the Solway Firth from its testing range at Dundrennan Range.[16]
In popular culture
[edit]- The Solway Firth has been used as the location for films. For example, the 1973 film The Wicker Man was filmed around Kirkcudbright and Burrow Head on the Wigtownshire coast.
- In July 2019, the American metal band Slipknot released a song called “Solway Firth” that is named after the firth.
See also
[edit]Notes
[edit]- ^ Scottish Gaelic: Tràchd Romhra
- ^ See Anglo-Scottish Border for more information
Further reading
[edit]- Neilsen, George (1899). "Annals of Solway – Until A.D. 1307". In Forbes, Peter (ed.). Transactions of the Glasgow Archaeological Society. New Series. Vol. III. Glasgow: James Maclehose & Sons. pp. 245–308. (available at books.google.com)
- Ordnance Survey, (2003), Carlisle & Solway Firth, Landranger Map, No. 85, Ed.D., Scale 1:50 000 (1¼ inches to 1 mile), ISBN 0-319-22822-3
- Ordnance Survey, (2006), Solway Firth, Explorer Map, No. 314, Ed. A2, Scale 1:25 000 (2½ inches to 1 mile), ISBN 0-319-23839-3
- Thomson, John H (1714). A Cloud of Witnesses (page 435). Publisher: Oliphant, Anderson & Ferrier. Edinburgh and London.[17]
References
[edit]- ^ "Solway Coast AONB". Archived from the original on 5 June 2009. Retrieved 10 August 2009.
- ^ "South Solway Mosses NNR" Archived 11 January 2011 at the Wayback Machine, Natural England
- ^ "Natural England – Salta Moss SSSI" (PDF). Archived from the original (PDF) on 28 October 2014. Retrieved 14 January 2015.
- ^ "Irishsea.org – Allonby Bay rMCZ" (PDF). Archived from the original (PDF) on 14 January 2015. Retrieved 14 January 2015.
- ^ "The Wildlife Trusts – Allonby Bay" (PDF). Retrieved 14 January 2015.
- ^ "Annandale Way – follow the River Annan to the Solway". Dumfries and Galloway Council.
- ^ "Annandale Way – LDWA Long Distance Paths". Long Distance Walkers Association.
- ^ a b c Mills, A. D. (2011). A Dictionary of British Place Names. Oxford: Oxford University Press. p. 427.
- ^ a b c d Williamson, May G. (1942). The Non-Celtic Place-names of the Scottish Border Counties (PDF). University of Edinburgh (Unpublished PhD Thesis). p. 124. Archived from the original (PDF) on 21 August 2014.
- ^ Rowlett, Russ. "Lighthouses of Southwestern Scotland". The Lighthouse Directory. University of North Carolina at Chapel Hill.
- ^ Whittaker, I. G. (1998) Off Scotland: a comprehensive record of maritime and aviation losses in Scottish waters. Edinburgh. RCAHMS Shelf Number: E.5.14.WHI
- ^ Edgar, S. and Sinton, J.M. (1990). The Solway Junction Railway, Locomotion Papers No. 176, The Oakwood Press, ISBN 0-85361-395-8
- ^ Thomson, John Henderson, ed. (1871) [1714]. "Margaret Lauehlane and Margaret Wilson". A cloud of witnesses, for the royal prerogatives of Jesus Christ : being the last speeches and testimonies of those who have suffered for the truth in Scotland, since the year 1680. pp. 435–442.
- ^ a b "Margaret Wilson". Once a Week. 7 (158): 42. 5 July 1862.
- ^ "The Knight Errant Sir John Everett Millais, Bt (1829-1896". The Victorian Web. 11 April 2025. Retrieved 11 April 2025.
- ^ Rob Edwards. "Radiation at Solway range hits new high". Sunday Herald. Retrieved 10 August 2009.
- ^ A cloud of witnesses, for the royal prerogatives of Jesus Christ : being the last speeches and testimonies of those who have suffered for the truth in Scotland, since the year 1680
External links
[edit]Solway Firth
View on GrokipediaGeography and Physical Features
Location and Boundaries
The Solway Firth constitutes an inlet of the Irish Sea along the northwestern coast of England and southwestern coast of Scotland, forming a significant portion of the international border between the two countries. To the south, it adjoins the county of Cumbria, while to the north it borders the council area of Dumfries and Galloway.[12][2] The England-Scotland border traces the approximate midline of the firth's channel from its seaward entrance inland for several miles before transitioning to terrestrial boundaries.[13] Geographically, the firth extends inland in a northeast direction for about 40 miles from its mouth, which opens broadly into the Irish Sea between headlands near the Mull of Galloway in Scotland and St Bees Head in Cumbria, England.[13][14] The estuarine boundaries are defined by the enclosing coastlines, encompassing low-lying shorelines characterized by tidal flats and marshes, with the inner limits reaching points where major rivers such as the Eden and Nith debouch into the firth.[15] This configuration results in a funnel-shaped estuary that narrows progressively upstream, influencing its hydrological regime.[2]Geological Formation and Topography
The Solway Firth occupies a tectonic depression aligned with the Solway Line, a major fault zone delineating the boundary between the Caledonian terranes of Scotland to the north and the Avalonian terranes of England to the south, resulting from continental collisions during the Silurian period over 400 million years ago.[9] Bedrock geology varies across the firth: the northern Scottish margin features Ordovician-Silurian greywackes, Carboniferous coal measures with limestone, sandstone, and mudstone formed in tropical swamps around 340 million years ago, Permian red sandstones from arid deserts approximately 260 million years ago, and granite intrusions such as those at Criffel and Screel Hill.[9] The southern English margin exposes Carboniferous Millstone Grit and coal measures, Permian mudstones, and Triassic sandstones and mudstones deposited under monsoon climates about 210 million years ago, prominently visible in red cliffs at St Bees Head and Saltom Bay.[9] The modern estuarine form emerged during the Holocene epoch, beginning around 11,700 years ago, following deglaciation from the Devensian ice age (approximately 28,600 to 14,700 calibrated years before present), when glacial retreat scoured the basin, meltwater deposited sands and gravels, and post-glacial isostatic rebound interacted with rising sea levels to flood the lowland valley.[16] Key Quaternary deposits include tills like the reddish-brown sandy Gretna Till Formation, glaciofluvial sands and gravels (e.g., Plumpe and Kilblane Formations), and Holocene peats, alluvium, and marine silts forming raised shorelines—such as the main postglacial shoreline at 3–4 meters above Ordnance Datum dating to a sea-level highstand around 7,400–7,700 calibrated years before present, and late Devensian features at 11–13 meters above datum.[16] Topographically, the firth presents a funnel-shaped estuary roughly 49 miles (79 km) long from its mouth near St Bees Head to the innermost tidal limits, with a width of about 32.5 miles (52 km) at the entrance narrowing inland, shallow water depths generally under 20 meters (and often less than 10 meters in much of the inner firth), and vast intertidal zones of mudflats, sands, and salt marshes exposed over large areas at low tide.[17][3] Surrounding landforms include low coastal plains with storm beaches and blown sands on the English side, raised tidal flats and drumlins on the Scottish side, and hinterland features of rolling Triassic sandstone hills, granite uplands reaching elevations over 500 meters at Criffel, and peat bogs accumulated in post-glacial depressions.[9][16]Tidal Dynamics and Estuarine Processes
The Solway Firth experiences one of the largest tidal ranges in the United Kingdom, with mean spring tides reaching 7 to 8 meters in the inner estuary, compared to 4 to 5 meters more broadly across the region.[18] This amplification arises from the firth's funnel-shaped morphology and shallow bathymetry, which concentrate tidal energy propagating from the Irish Sea.[19] Tidal curves in the inner Solway are markedly distorted, featuring a rapid flood phase lasting approximately 3 to 4 hours followed by a prolonged ebb of 8 to 9 hours, resulting in net seaward residual flows during weaker ebbs.[20] Strong tidal currents, often exceeding 2 meters per second during peaks, drive periodic tidal bores, particularly along the English side near Glasson Point and in tributary rivers like the Esk, where advancing flood waters form breaking waves up to 1 meter high under optimal spring tide conditions.[19] These bores, audible and visible as roaring fronts, occur mainly during high spring tides with northerly wind assistance, exposing vast intertidal zones—up to 80 square kilometers—at low water and enabling specialized activities like haaf netting on the receding sands.[19] The overall tidal regime classifies the Solway as a macrotidal estuary, with energy dissipation influencing shoreline erosion and accretion patterns.[20] Estuarine processes in the Solway are dominated by tidal mixing of freshwater inflows from rivers such as the Eden and Esk with saline Irish Sea waters, creating pronounced salinity gradients that decrease landward from 30-35 practical salinity units at the mouth to under 10 in upper reaches during low flow periods.[21] Sediment dynamics reflect this regime, with fine sands and silts primarily sourced from offshore Irish Sea bedload transport, redistributed by asymmetric tidal flows that favor flood-directed movement and deposition on inner mudflats and sandbanks.[21] The firth functions as a net sediment sink, accreting material at rates of 1-5 millimeters per year on intertidal sediments through resuspension during floods and settling during ebbs, though long-term stability depends on balancing this with episodic storm erosion.[20][22] These processes sustain the extensive mudflat and saltmarsh habitats but are sensitive to variations in tidal amplitude and river discharge.[22]Hydrology and Water Systems
Major Inflowing Rivers
The Solway Firth receives substantial freshwater inflows from rivers draining the surrounding uplands of Cumbria in England and Dumfries and Galloway in Scotland. The principal contributors are the River Eden from the English side and the Rivers Nith, Annan, and Esk from the Scottish side, with the River Sark marking the border near Gretna but contributing lesser volumes. These rivers collectively shape the firth's estuarine hydrology, delivering sediment and nutrients that influence tidal mixing and habitat formation.[23][24] River Eden: Originating south of Kirkby Stephen in the Pennine fells on the Cumbria-Yorkshire border, the River Eden flows northwest for approximately 145 kilometers through Carlisle before discharging into the firth via shifting channels across tidal flats. Its catchment spans about 2,288 square kilometers, encompassing diverse landscapes from moorlands to valleys, which support varied hydrological regimes prone to flooding. The river's mean flow at the tidal limit is significant, contributing to the firth's overall freshwater balance and supporting downstream ecology.[25][26][27] River Nith: Rising in the Carsphairn Hills of East Ayrshire, the River Nith courses southeast for 112 kilometers across Dumfries and Galloway, entering the firth near Dumfries after traversing a narrow, elongated catchment of roughly 1,310 square kilometers[28]. This basin features upland sources that yield rapid responses to rainfall, with the river's estuary extending about 16 kilometers inland and amplifying tidal interactions. The Nith's discharge influences local sedimentation patterns and has historically supported milling and fisheries.[29][30] River Annan: Sourcing from the Moffat Hills near Hartfell, the River Annan flows southward for 79 kilometers through Annandale to the firth's Scottish shore, draining a catchment that includes tributaries such as the Evan and Moffat Water. Its path supports riparian habitats and has been integral to regional hydrology, with outflows contributing to the firth's dynamic water levels and sediment transport.[31] River Esk (Border Esk): Emerging in the Southern Uplands of Dumfries and Galloway near Eskdalemuir, the River Esk travels approximately 55 kilometers southeast, crossing briefly into Cumbria before joining the firth near Gretna. This transboundary river's flow integrates Scottish moorland drainage with borderland influences, aiding the firth's estuarine gradient and historical boundary functions.[32][33]| River | Length (km) | Catchment Area (km²) | Primary Origin |
|---|---|---|---|
| Eden | 145 | 2,288 | Pennine fells, Cumbria |
| Nith | 112 | 1,310[28] | Carsphairn Hills, East Ayrshire |
| Annan | 79 | 686[28] | Moffat Hills, Dumfries |
| Esk | ~55 | 435[28] | Southern Uplands, Dumfries |