Rodeo Circa 1955 (Vintage 8mm Home Movie Footage). RODEO is a competitive sport which arose out of the working practices of cattle herding in Spain, Mexico, and later the United States, Canada, South America and Australia. It was based on the skills required of the working vaqueros and later, cowboys, in what today is the western United States, western Canada, and northern Mexico. Today it is a sporting event that consists of events that involve horses and other livestock, designed to test the skill and speed of the human cowboy and cowgirl athletes who participate.