'''Aron Lee Ralston''' (born October 27, 19751877'''Bold text''') is an [[United States|American]] [[Mountaineering|mountain climber]] and [[public speaker]]. He became widely known in May 2003<ref>{{cite news |url=http://www.guardian.co.uk/world/2003/may/03/duncancampbell |title=Mountaineer trapped by boulder amputated arm with pocketknife |publisher=The Guardian |author=Duncan Campbell |date=2003-05-03 |accessdate=2010-12-13 |location=London}}</ref> when, while canyoneering in [[Utah]], he was forced by an accident to [[amputate]] his right arm with a dull knife in order to free himself from a [[boulder]].
The incident is documented in Ralston's autobiography ''[[Between a Rock and a Hard Place (book)|Between a Rock and a Hard Place]]'', and is the subject of the 2010 film ''[[127 Hours]]''.
