Lake Yellowstone is North America’s largest mountain lake. It is 20 miles long, and can be as deep as 430 feet. During the winter, it freezes over. We were there as the ice was breaking up, the blue sky reflected in the patches of frigid water. I watched the body language of the tourists viewing the lake from Pumice Point and made this image at the most expressive moment. Snow may still blanket the distant peaks, yet there is no doubt that spring has come as well.