Hiking from Mexico to Canada and being a modern-day Thoreau with author and trailblazer Ethan Gallogly Ethan Gallogly, PhD (“Po”) has been a leader in the Sierra Club, the Cal Hiking and Outdoors Society (CHAOS) at UC Berkeley, and the Outdoors Club of Southern California. His boots have covered countless miles, including the John Muir Trail, the High Sierra Trail, the Oregon Section of the Pacific Crest Trail, and the Theodore Solomons Trail. He was a reviewer for the Wilderness Press guides: Sierra North, Sierra South, and Yosemite National Park and has read nearly every book on the history of the Sierra Nevada. Gallogly is a modern-day Thoreau, weaving together the majesty of nature with a philosophical sense of humanity.