Imperatrix (horse)

Imperatrix was a British Thoroughbred racehorse foaled in 1926. She was bred and owned by Lord Derby and trained by George Lambton. Primarily known as a staying filly, Imperatrix is best remembered for winning the 1929 St. Leger Stakes at Doncaster, ridden by jockey Tommy Weston.

Racing Career

While details of her two-year-old career are scarce, Imperatrix rose to prominence as a three-year-old in 1929. Leading up to the St. Leger, she demonstrated stamina and performed well in preparatory races, though she wasn't considered a top favorite for the Classic. Her victory in the St. Leger, a race typically dominated by colts, was notable.

St. Leger Stakes (1929)

Imperatrix's St. Leger win was considered something of an upset. Despite a strong field of colts, she stayed on well in the closing stages to secure the victory. The win added to Lord Derby's distinguished record in British Classic races.

Significance

Imperatrix’s success highlighted the potential of staying fillies in major races. While not a multiple Group 1 winner, her St. Leger victory secured her place in racing history. She is less well-known than some other Classic winners of the era, but she remains a notable female winner of the prestigious St. Leger Stakes.

Breeding Record

Information regarding Imperatrix's subsequent career as a broodmare is limited and readily available data regarding her foals and impact on Thoroughbred breeding is not widely documented.