A hill is classified as a Marilyn if it is a hill of any height with a drop of at least 150 metres or more on all sides. The name was coined as a punning contrast to the designation Munro, used for a Scottish mountain with a height of more than 3000 feet.
The book that introduced Marilyns to the world was Alan Dawson's The Relative Hills of Britain: Mountains, Munros and Marilyns.
There are over 1500 Marilyns in Great Britain and they vary greatly in character from our greatest hills such as Ben Nevis in Scotland and Scafell Pike here in the Lake District to the highest point of the Weald which lies within the East Sussex town of Crowborough.
There are 55 Marilyns in the Lake District.
Click on any Marilyn on the map below to find out more about it: