Longacres was a racetrack in Renton, Washington from 1933-92. It was the home of thoroughbred racing in western Washington and was the longest continually operated track on the West Coast. Longacres was the first racetrack on the coast based on parimutuel betting. The land was sold to the Boeing Company and the track closed in September 1992. Now called Boeing-Longacres park, it is owned partly by the city of Tukwila.
The track was located just east of Tukwila, immediately south of I-405, midway between I-5 and Highway 167.
After a three year absence, Emerald Downs in Auburn opened in 1996 as the new home of horse racing in western Washington. It currently hosts the Longacres Mile Handicap, a race first run in 1935. From 1993-95, the race was run at Yakima Meadows racetrack in Yakima.