Headed for the Mountains
Join Date: Sep 2007
Location: White Rock
Interest: Professional Rock Licker
There is no absolute value because other criteria must be considered. Bivouac.com has a number of articles on this and the general rule of thumb is 500 feet or 150 metres. But many exceptions exist. An example is Elk and Thurston which have only a 20 metre prominence but are far apart and normally listed as separate peaks.
if you're not hiking you should be skiing