Bred and raced by Col. Sam McLaughlin's Parkwood Stable, he was out of the mare Star Pal and sired by Hourless, the 1917 American Co-Champion 3-Yr-Old Male Horse and winner of the Belmont Stakes.
In an era when horses often raced once a week or even more often, just four days after Horometer won the King's Plate, he claimed victory in the Breeders' Stakes.
Three days after that, he was sent to the track again and suffered the only loss of his career when he finished second by a nose in the William Hendrie Memorial Handicap.
In his final race in June 1934, Horometer won the Canadian Breeders' Handicap at the now-defunct Long Branch Racetrack in Toronto but came out of the race with an injury and, after apparently recovering, went lame following a training workout.
Horometer was part of the inaugural class inducted into the Canadian Horse Racing Hall of Fame on its formation in 1976.