63rd Annual Scottsdale Arabian Show, February 15-25, 2018. West World, Scottsdale, AZ. Show Secretary, Mary Katanga, Peoria, AZ. 623-334-5219. Fully accredited; world’s largest Arabian horse show of its kind, with more than 2,000 horses and a huge trade show; more than 300,000 people attend annually, from an estimated 50 countries.