The Blue Grass Stakes, currently the Toyota Blue Grass Stakes due to sponsorship by the Toyota Motor Corporation, is a horse race for 3-year-old Thoroughbreds held annually in April at Keeneland Racecourse in Lexington, Kentucky.
The race is run at 1+1⁄8 miles on the dirt and currently offers a purse of $1,000,000.
It was named for the Bluegrass region of Kentucky, characterized by grass having bluish-green culms, which is known as the "heart" of the thoroughbred racing industry.
In 1943–1944, the Blue Grass was renewed as a part of the Keeneland-at-Churchill Downs meeting.
In 1945, the Blue Grass was run as part of the Churchill Downs meeting.