St Louis was an Irish-bred, British-trained thoroughbred racehorse and sire. He finished unplaced on his only start as a juvenile but made rapid improvement over the winter and won the 2000 Guineas in April 1922. He finished fourth when favourite for the Epsom Derby and then won a minor race at Wolverhampton Racecourse but was withdrawn from the St Leger after running poorly in a trial race. After failing to win on his only run as a four-year-old he was retired to stud, but had no success as a breeding stallion.
St Louis made only one appearance on the track as a two-year-old and made little impression as he finished unplaced in a minor race.
1922: three-year-old season
Ridden by the American jockey George Archibald, St Louis stated at odds of 6/1 in a 22-runner field for the 114th running of the 2000 Guineas over the Rowley Mile at Newmarket Racecourse on 26 April. Racing on soft ground he took the lead from Captain Cuttle in the final furlong and drew away to win easily by three lengths from Solomon Joel's Pondoland with the fading Captain Cuttle four lengths back in third. Lord Queenborough donated £200 of the prize money to two racing charities, namely the Rous Memorial Fund and the Bentinck Benevolent Fund. St Louis's success saw him elevated to favouritism for the Epsom Derby. On 29 May St Louis started favourite for the Derby over one and a half miles put appeared to be unsuited by the firmer ground and finished fourth behind Captain Cuttle, Tamar and Craigangower. St Louis was off the course until August, when he started at odds of 1/9 against four moderate opponents in the Wolverhampton Breeder's Foal Plate over ten furlongs. With Archibald in the saddle he won very easily by five lengths from Clincher, to whom he was conceding 20 pounds in weight. The colt was strongly fancied for the St Leger Stakes at Doncaster Racecoursein September, but in his final prep race he came home last of the three runners behind Express Delivery in the Great Yorkshire Stakes over one and a half mile at York, and was withdrawn from the Leger a few days later. St Louis's earnings of £11,084 for the year made him the fifth most successful racehorse of the season.
1923: four-year-old season
St Louis remained in training but was beaten on his only start. When he was put up for auction at the end of the year he failed to reach his reserve price of 4,200 guineas and was retained by his owner.
Assessment and honours
In their book, A Century of Champions, based on the Timeform rating system, John Randall and Tony Morris rated St Louis a "poor" winner of the 2000 Guineas.
Stud record
St Louis was retired to become a breeding stallion at Lord Queenborough's Snarehill Stud in Norfolk. He sired no major winners and his last reported foals were born in 1933.
Pedigree
St Louis was inbred 3 × 4 to St Simon, meaning that this stallion appeare in both the third and fourth generations of his pedigree. He was also inbred 4 × 4 to Sterling