We hiked down about halfway, because we stopped for many lectures. The guy in the back with the yellow shirt and red bandana was one of the professors, Dr Hayes who was focused in historical geology. In front of him is Taz Talley (white t shirt and shorts), another one of the professors, whose work was more on physical geology and he was also a bodybuilder. I liked him (Taz) a lot and he was a good teacher. He gave us extra credit whenever we found a spelling error on his handouts, so we were always getting points for that. :)