2005 World Thoroughbred Racehorse Rankings

The 2005 World Thoroughbred Racehorse Rankings is the 2005 edition of the World Thoroughbred Racehorse Rankings. It is an assessment of racehorses which was issued by the International Federation of Horseracing Authorities (IFHA) in January 2006. It includes horses aged three or older which raced or were trained during 2005 in countries where the flat racing year runs from January 1 to December 31. These countries are generally in the Northern Hemisphere.

The ratings represent a weight value in pounds, with higher values given to horses which showed greater ability. It is judged that these weights would equalize the abilities of the horses if carried in a theoretical handicap race. The list includes all horses rated 115 or above, and it also shows the surface and the distances at which the rating was achieved.

The highest rating in the 2005 season was 130, which was given to the performance of Hurricane Run in the Prix de l'Arc de Triomphe. In total, 148 horses were included in the list, fourteen less than in the 2004 Rankings.

Certain horses may have also recorded a lesser rating over a distance different from that listed above. The IFHA publishes this information when the lower rating represents the overall top performance in a particular category. There were four such additional ratings for this season:

The tables below show the top ranked horses overall, the top fillies and mares, and the top three-year-olds in the 2005 Rankings. They also show the top performers in various subdivisions of each group, which are defined by the distances of races, and the surfaces on which they are run. The IFHA recognizes five distance categories — Sprint, Mile, Intermediate, Long and Extended — identified by the acronym "SMILE". These are framed as follows:

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