1969: two-year-old season Humble Duty's first appearance on a racecourse came in May 1969 when she won the Ann Boleyn Stakes over five
furlongs at
Sandown Park. Although the winning margin was only a
length and the opposition moderate, Humble Duty was immediately moved up in class to contest the
Queen Mary Stakes at
Royal Ascot. She led for most of the race before being overtaken a furlong from the finish and took third place behind Farfalla. After a break of two months, during which she was affected by a cough, she returned in the Lowther Stakes at York in August in which she was matched against Mange Tout, a filly who had won the
Prix d'Arenberg and the
Molecomb Stakes. Humble Duty won by three quarters of a length from Pisces, with Mange Tout in third. Her final appearance of the year came in the
Cheveley Park Stakes at Newmarket in October. Humble Duty led from the start and won by lengths from Farfalla and Black Satin. In the Free Handicap, a ranking of the best two-year-olds to have run in Britain in 1969, Humble Duty was the top-rated filly, seven pounds below the leading colt
Nijinsky.
1970: three-year-old season On her first appearance of 1970, Humble Duty ran at
Newbury in the
Fred Darling Stakes, a trial race for the 1000 Guineas. She appeared less than fully fit and was given a very gentle race by her jockey
Lester Piggott in finishing second to Highest Hopes. by three-quarters of a length from Gold Rod, Joshua and
Welsh Pageant. In August, Humble Duty added another major victory over Goodwood's mile course when she won the
Wills Mile by a length from Prince de Galles (
Cambridgeshire Handicap) and Yellow God (runner-up to Nijinsky in the
2000 Guineas). In her final race, Humble Duty failed to reproduce her best form, finishing fourth behind Welsh Pageant, Gold Rod and Prince de Galles in the
Queen Elizabeth II Stakes at Ascot in September. ==Retirement==