Butch Cassidy's Wild Bunch was one of the loosely organized outlaw gangs operating out of the Hole-in-the-Wall, near Kaycee in Wyoming, a natural fortress of caves, with a narrow entrance that was constantly guarded.

Associations with ranchers like these in the area allowed the gang considerable mobility, giving them an easy resupply of fresh horses and supplies, and a place to hole up for a night or two.

At 1:00 am on June 2, 1899, Cassidy, Sundance Kid, Harvey Logan, and Lay robbed a Union Pacific train near Wilcox, Wyoming.

In November 1908, Cassidy and Sundance are believed to have been killed in a shootout with the Bolivian Army; the exact circumstances of their fate continue to be disputed.

She was suspected to have reinvented herself as a brothel and hotel owner named Eunice Gray, in Fort Worth, Texas; recent photographic evidence refutes this theory.

Elzy Lay was released from prison in 1906, and after a brief visit to the Bassett ranch in Utah, he relocated to California, where he became a respected businessman; he died there in 1934.

Laura Bullion was released from prison in 1905, and lived the remainder of her life as a seamstress, dying in Memphis, Tennessee, in 1961, the last of the Wild Bunch.