Good physical and mental condition. Cause - human error caused by subject, weather, darkness. Those who travelled more than 10 mi, also descended several thousand feet, and followed trails, as opposed to going cross-country. Climb for the pure joy of climbing. They do not need to have a great deal of physical strength nor superior co-ordination.
Avalanches are the major cause of fatalities.
Falling is the major cause of injuries. Well equipped and self-sufficent. Tend to stay on or near routes. Many climbing accidents never get reported because of pride. Sometimes oriented to the past.