The castle grounds site was established as a public park after the castle site was acquired by the council. Of the £15,000 raised in 1920, £9,500 was spent to purchase the site, and the rest used laying out the park. It incorporates the early 18th-century garden terraces created for the steward's residence. Bowling greens, tennis courts, a putting green, a bandstand and pavilion café were installed, and specimen trees planted as part of the landscaping include a fern-leaf beech and a dawn redwood. The war memorial, a sculpture of a soldier standing atop a pedestal in a mourning pose with head bowed and arms reversed, is located south of the keep. The main inscription reads "Erected by the inhabitants of Clitheroe in grateful remembrance of their fellow townsmen who gave their lives in defence of their king and country in the Great War 1914 1918". The sculptor was Louis Frederick Roslyn, and the same figure is used in the memorial at Slaidburn. There is also a memorial plaque to those killed in the Second Boer War, installed in 1907.