Breeder Lionel B. Holliday kept part ownership of Vaguely Noble in Brook Holliday's name as part of a partnership with Americans Wilma Franklyn and Nelson Bunker Hunt. Racing at age two, the colt finished second in his first two races then won two in a row before ending the 1967 season. In 1968 he was sent to race in France where his conditioning was taken over by Etienne Pollet. Vaguely Noble won four of his five races entered including France's most prestigious race, the Prix de l'Arc de Triomphe at Longchamp.
Retired, Vaguely Noble was sent to stand at stud at Gainesway Farm in Lexington, Kentucky. Highly successful, he sired 70 graded stakes race winners and was the broodmare sire of more than 165 stakes winners.
Vaguely Noble died in 1989 at the age of 24 and was buried in the equine cemetery at Gainesway Farm.