Peak Bagging is an activity enjoyed by many walkers, it involves trying to complete all of the summits in a particular area. The collections of summits being bagged are usually defined by their hill classification; the classifications themselves are usually defined by a particular area, a particular height range and a particular amount of drop present on all sides. Take the classification CORBETT for example defined by J Rooke Corbett; a Corbett must abide by the following criteria:
AREA: Must be in Scotland
HEIGHT RANGE: Must be between 762m (2500ft) and 915m (2999ft) high
DROP: Must have 152m (500ft) of drop on all sides
By definition there are 221 Corbetts
Some classifications are not defined by such criteria and are simply the summits defined by a particular person, for example Alfred Wainwright documented 214 summits in the Lake District in his series of pictorial guides, these summits are known as and have the classification of Wainwright. Wainwright chose these summits subjectively, they were not chosen because they fell within a particular height range or had a particular amount of drop on all sides, they were simply 214 fells that Wainwright decided to walk up and write about over a 13 year period. Every year millions of peak baggers flock to the Lake District to follow in his legacy with the aim of completing all of the Wainwright fells.