WASHINGTON, August 15, 2013—The Washington International Horse Show (WIHS) is pleased to announce that tickets are now on sale for its 2013 competition, which will run Oct. 22-27, 2013, at Verizon Center in downtown Washington, D.C. Tickets are available for purchase at the Verizon Center box office, online at www.Ticketmaster.com or by calling 1-800-745-3000.