It started as a small show in 1969 with a few hundred attendees and has grown to Bishop's largest event, attracting as many as 30,000 spectators.
Grand marshalls of the parade in past years have included Ronald Reagan[3] and Norman Livermore.
Activities also range from packing to dressage, and from team chariot racing to mule shoeing contests.
The event is described as a "wild and wooly spectacular" with "more than one hundred horses and mules running loose in the arena.
Each team must wrangle its own mules out of a herd in the arena, pack them correctly, and race around to the finish line as spectators whoop, cheer and jeer.