A newspaper stages a 700-mile horse race across the Western landscape in 1906, and this lavishly produced film follows the diverse group of competitors. Among them are two men who served together as Rough Riders (played by Gene Hackman and James Coburn), along with a woman working as a prostitute (Candice Bergen), a rebellious young man called “Kid” (Jan-Michael Vincent), an older cowboy (Ben Johnson), a Mexican suff…