Keeneland Association, Inc. is an equine business based in Lexington, Kentucky. It includes two distinct divisions: the Keeneland Race Course, a Thoroughbred racing facility, and Keeneland Sales, a horse auction complex. It is also known for its reference library. In 2009, the Horseplayers Association of North America introduced a rating system for 65 Thoroughbred racetracks in North America. Keeneland was ranked #1 of the top ten tracks. It is listed on the National Register of Historic Places and designated a National Historic Landmark in 1986.