From the first account of “Colter’s Run,” published in 1810, fascination with John Colter, one of America’s most famous and yet least known frontiersmen and discoverer of Yellowstone Park, has never waned. Unlike other legends of the era like Daniel Boone, Davy Crockett, and Kit Carson, Colter has remained elusive because he left not a single letter, diary, or reminiscence. Gathering the available evidence and guiding readers through a labyrinth of hearsay, rumor, and myth, two Colter experts for the first time tell the whole story of Colter and his legend.