From www.magnaent.com:
Thistledown is located on 128 acres approximately 10 miles southeast of downtown Cleveland. Thistledown has one of the longest racing seasons of all North American thoroughbred racetracks, covering approximately 185 racing days between March and December.
Annually, Thistledown hosts the Ohio Derby, which is the premier graded stakes race in Ohio and one of the top races for three-year olds in the country. Thistledown's facilities include a one-mile oval track.