Two years ago I had the good fortune to go on a trek to Mt. Everest base camp. It was the most amazing experience. This photo was taken at about 14,000 feet. It's where lichen like to hang out.
If you've been thinking about trekking in Nepal, I recommend Malla Treks guide service. Jamling Tenzing Norgay owns the company. Jamling was featured in the Imax movie Everest. His father Tenzing, of coarse, was the first to summit Everest along with Edmund Hillary.