River Cocker (Cumbria)
General data
- Name: River Cocker (Cumbria)
- Water system: River Derwent (Cumbria)
- Water type: River
- Progression: River Derwent (Cumbria) -> Irish Sea -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: Europe
- Countries: England (UK)
The River Cocker is a river in the Lake District in North West England, in the county of Cumbria. Its source is at the head of the Buttermere valley. It flows north through Buttermere and then Crummock Water, through Lorton Vale, to the town of Cockermouth, where it joins the River Derwent. It is roughly 19 km long.