River Derwent, Cumbria

The Derwent is a river in the county of Cumbria in the north of England; it rises in the Lake District and flows northwards through two of its principal lakes, before turning sharply westward to enter the Irish Sea at Workington The name Derwent is shared with three other English rivers and is thought to be derived from a Celtic word for "oak trees"[1] (an alternative is dour water and (g)-went white / pure ).[2]

River Derwent
Derwent at Grange Bridge
Location of the mouth within Cumbria
Location
Country	United Kingdom
Country within the UK	England
Counties	Cumbria
Physical characteristics
Source	Styhead Tarn
Mouth
• location	Irish Sea at Workington
• coordinates	54°38′58″N 3°34′8″W
Discharge
• location	Workington
Basin features
Tributaries
• left	River Cocker, River Marron
• right	River Greta

The river rises at Sprinkling Tarn underneath Scafell Pike and flows in a northerly direction through the valley of Borrowdale, before entering Derwentwater, which it exits to the north just outside Keswick and is joined by the waters of the River Greta. The Derwent then enters Bassenthwaite Lake at its southern end; it exits it at its northern end, thereafter flowing generally westward to Cockermouth, where the River Cocker joins it from the south. (William Wordsworth's childhood home in Cockermouth backed onto the Derwent, and he briefly mentions it in The Prelude:

... the bright blue river passed
along the terrace of our childhood walk;
A tempting playmate whom we dearly loved)[3]

From Cockermouth, the river continues westward past Papcastle, site of the Roman fort of Derventio (The Roman fort and settlement at Malton on the Yorkshire Derwent was also Derventio, as was a fort and settlement on the Derbyshire Derwent at Little Chester.) and onwards to Workington, where it flows into the Irish Sea.

The River Derwent was officially named by Sir Braelyn Smith in 1634 after he laid claim to the baronnies of Allerdale.