The lake occupies part of Borrowdale and lies immediately south of the town of Keswick. It is both fed and drained by the River Derwent. It measures approximately 3 miles (4.8 km) long by 1 mile (1.6 km) wide and is some 72 feet (22 m) deep. There are several islands within the lake, one of which is inhabited. Derwent Island House, an 18th-century residence, is a tenanted National Trust property open to the public on five days each year.
Derwentwater is a place of considerable scenic value. It is surrounded by fells, and many of the slopes facing Derwentwater are extensively wooded. A regular passenger launch operates on the lake, taking passengers between various landing stages. There are seven lakeside marinas, the most popular stops being Keswick, Portinscale and the Lodore Falls, from which boats may be hired. Recreational walking is a major tourist activity in the area and there is an extensive network of footpaths in the hills and woods surrounding the lake.
There are numerous islands in Derwentwater, the largest being Derwent Island, Lord's Island, St Herbert's Island, Rampsholme Island, Park Neb, Otter Island, and Otterbield Island. St. Herbert's Island is named after a 7th century hermit priest; Herbert of Derwentwater.
The Centenary Stone, Derwent Water
Andesite (Borrowdale Glacial Boulder)
110 x 140 x 130 cm 110 x 140 x 90 cm
On the shore of the lake between Calf Close Bay and Broomhill Point there is a sculpture by Peter Randall-Page,
Commissioned by the National Trust in its Centenary Year supported by the National Trust’s Foundation for Art, Northern County Council and National Trust Centres Associations. Sculpture is situated on the shore of Derwent water between Calf Close Bay and Broomhill Point looking across to Brandlehow, near Keswick, The lake District, Cumbria.
It was made from a large boulder of volcanic Borrowdale stone (andesite), sawn in half with each face carved into ten segments in a fan arrangement. Depending on the water level of the lake it may be semi or even fully submerged.
References Derwentwater - Wikipedia