On a walk through the snow-capped mountains of San Jacinto State Park in California, I was surprised to see these little knobs of yellow-white fungus on the bark of a tree. They were growing about 10 feet above the ground (the one I photographed up-close was found on the floor), and unfortunately I'm not as tall to take a closer shot.
Found 8,000 feet above sea level in a park reached through the Palm Springs Aerial Tram. The tree seems to be a Jeffrey Pine, but I could be mistaken.
At first seems like a discolored sulfur shelf, Laetiporus sulphureus.