Aqueduct Racetrack, New York City
http://www.nyra.com/aqueduct/

Arlington Park, Arlington Heights, Illinois
http://www.arlingtonpark.com/

Bay Meadows, San Mateo, California
http://www.baymeadows.com/

Belmont Park, Elmont, New York (site of Belmont Stakes)
http://www.nyra.com/

Churchill Downs, Louisville, Kentucky (site of Kentucky Derby)
http://www.churchilldowns.com/

Colonial Downs, New Kent County, Virginia
http://www.colonialdowns.com/

Del Mar, Del Mar, California
http://www.dmtc.com/

Gulfstream Park, Hallandale Beach, Florida
http://www.gulfstreampark.com/

Hollywood Park, Inglewood, California
http://www.hollywoodpark.com/

Keeneland Race Course, Lexington, Kentucky
http://www.keeneland.com/

Lone Star Park, Grand Prairie, Texas
http://www.lonestarpark.com/

Meadowlands Racetrack, East Rutherford, New Jersey
http://www.thebigm.com/

Oaklawn Park, Hot Springs, Arkansas
http://www.oaklawn.com/

Philadelphia Park, Bensalem, Pennsylvania
http://www.philadelphiapark.com/

Pimlico Race Course, Baltimore, Maryland (site of Preakness Stakes)
http://www.pimlico.com/

Santa Anita Park, Arcadia, California
http://www.santaanita.com/

Saratoga Race Course, Saratoga Springs, New York
http://www.nyra.com/saratoga/

Suffolk Downs, East Boston, Massachusetts
http://www.suffolkdowns.com/