 Her handlers then entered her only in sprint races; she won the six-furlong King George Stakes and the five-furlong Nunthorpe Stakes.Retired to breeding duties at the Aga Khan III's Sheshoon Stud at the Curragh in County Kildare, Ireland, Mumtaz Mahal became an important broodmare.Mumtaz Mahal's best racing son was Mirza II; he (like her) raced his best at distances of six furlongs or less but his trainer, Frank Butters, said he was the fastest horse he had ever conditioned.