Area of Outstanding Natural Beauty or AONB), and is National Trust property.

Arnside Knott is the lowest Marilyn (i.e. a hill with at least 150 m of topographic prominence) in England. It was not included in Alan Dawson's The Relative Hills of Britain (1992: ) which was the first listing of Marilyns and showed the lowest one as the Hebridean island of Muldoanich, but was