Helldorado offers cinematic images of wagon trains crossing the Great Plains, of Phoenix and Denver emerging from the dust and mud, of Tombstone blazing through a silver bonanza, and of the railroad joining East and West to change history. In his memoirs, originally published in 1928, William M. Breakenridge is shown doing about everything an enterprising and vigorous young man could do on the frontier. After leaving Wisconsin at the age of sixteen, he became a teamster, railroader; and lawman in Colorado, Arizona, and elsewhere. He took part in the Sand Creek Massacre, here described from his own point of view. Helldorado heats up in its evocation of early-day Tombstone, where, as deputy sheriff, Breakenridge encountered the Earp brothers, Doc Holliday, Bat Masterson, Luke Short, John Ringo, and Buckskin Frank Leslie.

In his introduction Richard Maxwell Brown asserts that Breakenridge "flourished in the pioneer era of the gunfight and survived its dangers to grow old and successful in the modern West." Beekman Professor of Northwest and Pacific History at the University of Oregon, Brown is the author of No Duty to Retreat: Violence and Values in American History and Society.