At 14,110 feet, the weather station atop Pikes Peak, Colorado, was the highest in the world in 1873. Young men trained by the Signal Corps took turns living year-round on the isolated mountain, where they endured loneliness, primitive living conditions, lack of financial support and appreciation, and deteriorating health. Most did so with dedication and good humor. Some suffered frostbitten hands, feet and ears when they became lost on the snowy mountain...