Derwentwater or Derwent Water, can be found in the Lake District National Park in the north west of England.
It is a ten minute walk from Keswick town.
Derwentwater measures approximately 3 miles (4.8 km) long, 1 mile (1.6 km) wide and is 72 feet (22 m) deep. Derwentwater is fed by the River Derwent from the high fells at the head of Borrowdale. To the west of Derwentwater rise the fells of Cat Bells. To the east is Friar’s Crag.
It is about 8 miles (12.8 km) around the lake if you want to take a walk or if you are not feeling energetic and fancy a leisurely lake cruise, you can take the Keswick Launch which lasts 50 minutes.
There are several islands within the lake. Derwent Island is the only inhabited Island. Derwent Island House on Derwent Island, is an 18th-century residence, which is a tenanted National Trust property, open to the public on five days each year.
The other other larger islands are Lord’s Island, St Herbert’s Island and Rampsholme Island. The smaller islands are Park Neb, Otter Island and Otterbield Island.
Lord’s Island was once the home of the Earl of Derwentwater. The ruins of the house can still be seen amongst the undergrowth. St Herbert’s Island is named after the hermit, or anchorite who lived there in the 7th Century.
All of the major islands are owned by the National Trust.