Estes Park was hardly more than a post office in 1899, when young Joe Mills first saw Colorado's Front Range. A would-be Robinson Crusoe, Joe scaled peaks, watched wild animals, hunted and trapped, and generally roughed it in the region that would become Rocky Mountain National Park in 1915. A Mountain Boyhood , the true story of his adventures there, is as rich in human as in natural history. Joe meets a colorful bunch of early settlers, living for...