The River Dour is the 'green artery' that runs through the parks to Dover. It starts from a groundwater aquifer in the Alkham Valley and runs for four miles through the Kearsney Parks, into the town, and then out into the English Channel at Wellington Dock in Dover Harbour.
The River Dour is a rare habitat for flora and fauna, one of only 200 chalk streams in the world. Permeating through the chalk of the North Downs, the Dour has exceptional water quality along with a stable temperature that supports the most significant colony of brown trout in south east England. The name Kearsney is derived from the French cressonnière, a place where watercress grows.