Arlington Park is a horse race track in the Chicago suburb of Arlington Heights, Illinois. Horse racing in the Chicago region has been a popular sport since the early days of the city in the 1830s, and at one time Chicago had more horse racing tracks (six) than any other major metropolitan area. Arlington Park was the site of the first thoroughbred race with a million-dollar purse in 1981.
The track officially opened in 1927 to 20,000 spectators.
