What horse show turned 100 this year? Earn your Noteworthy in Horses badge! 1. What horse show turned 100 years old in 2016? Rolex Aiken Madison Square Garden National Western Stock Show Loading… Share this:ShareFacebookTwitterPinterestLinkedIn Related Related posts: What is the world’s horse population today? The first official NW Stock Show started in January of what year? U.S General Robert E. Lee’s closest companion and devoted horse was who? Which of these is another name for the horse Justin Morgan?