As of June 12th. From the ranger station.
The first 2.5 miles of trail is mostly snow free. From approx. mile 2 to Lone Pine Lake occasional drifts of varying depth cover the trail but route finding isn't too difficult if you are paying attention. Look for red markers in snowy areas indicating location of trail. There are some sections of trail with mud and/or standing water just below and just above Lone Pine Lake. Protect adjacent fragile vegetation and stay on the trail. Do not go around these sections. Beyond Lone Pine Lake, the trail is covered in many areas with large fields of deep snow and good route finding skills are necessary. Ski, snowshoe, and boot tracks lead in many directions, most being off-route.
There are a few snow free campsites in the Lone Pine Lake and Outpost areas but if you plan on doing a multi-day trip be prepared to camp on snow.
Above Trail Camp, the switchbacks are covered with snow and ice. If you are intent on summiting Mt. Whitney, solid winter mountaineering skills and experience are needed. During the past couple of weeks many visitors with inadequate skills, experience and equipment have been observed. Do not underestimate the severity of current conditions on Mount Whitney. Most fatalities on Whitney involve steep snow and ice. Don't get in over your head.