1972: two-year-old season

Racing in the United States at age two, La Prevoyante went undefeated,^[2] winning all 12 starts under jockey John LeBlanc en route to the 1972 Eclipse Award as American Champion Two-Year-Old Filly ^[3] and the Sovereign Award as the Canadian Horse of the Year.^[4] In a rare occurrence, two two-year-olds topped the balloting for 1972 American Horse of the Year honours with Secretariat edging out La Prevoyante. Secretariat received the votes of the Thoroughbred Racing Associations of North America and the Daily Racing Form, while La Prevoyante was chosen by the National Turf Writers Association.^[5]

1973: three-year-old season

As a 3-year-old, La Prevoyante did not achieve the same success. She lost for the first time in her initial start, finishing second in a six-furlong race at Gulfstream Park. She took another second in the 1973 Kentucky Oaks and was third in the Canadian Oaks.

Her French Canadian owner brought La Prevoyante to his hometown of Montreal, Quebec where she won the Quebec Derby at Blue Bonnets Raceway. Although the betting favorite, on a muddy track she finished well back in the 1973 Queen's Plate at Woodbine Racetrack in Toronto, Ontario.

1974: four-year-old season

In 1974, she won three consecutive sprint races at the Saratoga Race Course. Following the December 28, 1974 Miss Florida Handicap at the Tropical-at-Calder meet, La Prevoyante collapsed in the unsaddling area. She got back on her feet and was able to walk to the stables but collapsed again and died of a ruptured lung.