Definitions section

The approach to building lists of peaks on this website assumes that some knowledge exists of terms such as prominence. Some readers may be familiar with these terms, while others may not. Additionally, Jim Bloomer & Roddy Urquhart have come up with a shorthand way of describing peaks given in the glossary below.

Quick Glossary

This section of the website includes the following:

  • An explanation of the notion of prominence
  • The flooded island analogy as a model for understanding prominence
  • A description of the hierarchical nature of prominence
  • A quick glossary of terms


The following terms are used frequently on this website:

  • Bloomer s Challenge is the term given for all the UK peaks with a minimum prominence of 500 metres. More
  • Dominance is a topographic term which is the prominence of a peak divided by its height. The dominance peak on an island has dominance 100% More
  • Height is the height of a summit above sea level
  • H500 is a group of peaks with height of 500-749 metres
  • H750 is a group of peaks with height of 750-999 metres
  • H1000 is a group of peaks with height of 1000 metres or greater
  • Key col is the lowest col connecting a peak and its prominence parent. More
  • Prominence is a topographic term to indicate the distinctiveness of a peak with respect to its environment. More
  • Prominence hierarchy is the hierarchy of a set of peaks based on prominence. More
  • P100 is a group of peaks with prominence of 100-199 metres
  • P200 is a group of peaks with prominence of 200-499 metres
  • P500 is a group of peaks with prominence of 500-999 metres
  • P1000 is a group of peaks with prominence of 1000-1999 metres
  • P500+ is a group of peaks with prominence of at least 500 metres. This is synonymous with the P500 plus P1000 peaks for the UK. It is also the same as Bloomer s challenge. More
  • UK prominent peak is the term given for all the UK peaks with a minimum prominence of 100 metres and a minimum height of 500 metres.