Claim: At 80 acres, Darley Park is the smallest of the areas and is formed largely of steep bank that has a rise from the river level of about 30m.
Evidence: The name Darley Park is often used to describe all or the separate parts that make up the Darley Open Spaces; a number of adjacent urban park areas that lie on either side of the banks of the River Derwent, at the gateway to the Derwent Valley Mills World Heritage Site. They are; Darley Park, Derwent Park, Parker's Piece, Chester Green, Darley Fields and Nutwood Nature Reserve. At 80 acres, Darley Park is the largest of the areas.