Suffolk Downs was a Thoroughbred race track in East Boston, Massachusetts, United States. The track opened in 1935 after being built by Joseph A. Tomasello at a cost of $2 million. It was sold in May 2017 to a developer who plans to create housing and a shopping district. The final day of live racing at the track was June 30, 2019, with the facility hosting simulcast race wagering thereafter. The only remaining live horse racing in Massachusetts is at Plainridge Park Casino, which has harness racing.