Even among iconic frontiersmen like John C. FrÉmont, Kit Carson, and Jedediah Smith, Jim Bridger stands out. A mountain man of the American West, straddling the fur trade era and the age of exploration, he lived the life legends are made of. His adventures are fit for remaking into the tall tales Bridger himself liked to tell. Here, in a biography that finally gives this outsize character his due, Jerry Enzler takes this frontiersman’s full measure for the first time—and tells a story that would do Jim Bridger proud. Born in 1804 and orphaned at thirteen, Bridger made his first western...