Note: Everyone BEWARE! People have died attempting to glissade on Mt. Whitney! Here are some guidelines:
1. Never glissade wearing crampons. (see BobR's x-ray)
2. Never glissade without an ice axe for a brake.
3. On Mt. Whitney, the top of the slope can be soft, but iced-up below, since the afternoon sun shadow starts at the bottom and moves up. So late afternoon can be treacherous.
4. Learn and practice self-arrest techniques and glissading before trying to glissade from Trail Crest on Mt. Whitney.