The Arlington Million is a prestigious horse race held annually at Arlington Park in Illinois. Established in 1981, it is a thoroughbred race that covers a distance of one mile and a quarter on turf. The event is part of the Breeders' Cup Challenge series, offering a chance for horses to qualify for the Breeders' Cup Turf. This race attracts top horses, trainers, and jockeys from around the world, making it a significant event in the horse racing calendar. The Arlington Million has a rich history and has contributed to the popularity of turf racing in the United States.