The Blackwater Valley stretches from Rowhill on the Hampshire and Surrey border, to Swallowfield in Berkshire.
After rising at Rowhill Copse, the river joins the Whitewater 23 miles later becoming the Broadwater.
Landscape of the valley
The Blackwater Valley has a surprisingly varied landscape rich in wildlife, and the shallow floodplain along the river, set amidst extensive heathlands and woodlands, contains many lakes and wet meadows created by many years of gravel and sand extraction.
Over 300,000 people live in this area and the network of public green spaces and footpaths adds greatly to their quality of life.