A racecourse in Auburn, Washington swapped horses for dinosaurs as contestants clad in Tyrannosaurus rex costumes competed for the title of fastest prehistoric runner.<br /><br />Runners of all ages took part in the annual "T-Rex World Championship Races" at the Emerald Downs track.<br /><br />The event, which began in 2017, featured several heats with contestants required to wear inflatable, wobbly-headed T-rex costumes.<br /><br />#Trex #dinosaur #U.S. #race