As a starting point, here's the info under
"What can go wrong on Whitney" Ice/Snow
Ice can be a unexpected problem on the 97 switchbacks of the main trail, particularly in the cables area. As noted in Fall Conditions on the Main Whitney Trail, the switchbacks are mostly north facing and can hold on to ice longer than other sections of the trail. The switchbacks are dangerous to hike in icy conditions without the proper mountaineering experience and equipment. In the spring months, some people are tempted to glissade down the chute below Trail Crest. That is a very dangerous area and people have died sliding into the rocks below. See the reports 2003 Glissade Fatality and 2005 Glissade Fatality. Only people with the proper mountaineering training should attempt that route and then only in favorable snow conditions. See Bob R's reports Glissading from Trail Crest and Bob R. glissade video, Mt. Whitney June 22, 2006 for more information. Also check out the report on the 2005 MR fatality.
Snow can also be a hazard in the non-summer months. Only people with winter mountaineering experience should attempt to hike in snow. See the reports Accident on Whitney, Slipped in the cables area, and Whiteout Incident on Whitney.
