1925: two-year-old season Coronach made his debut in July when he won a
maiden race at
Salisbury. He then won the Rous Memorial Stakes at
Goodwood in "effortless" style, leading the
Sporting Life to describe him as "one of the best two-year-olds in England". Coronach completed his hat-trick in the
Champagne Stakes at
Doncaster, leading from the start and beating Lex by four lengths without being seriously challenged. Coronach was coughing after his Doncaster win but appeared to have made a full recovery by October. On his final start he was beaten a neck by Lex in the
Middle Park Stakes at
Newmarket. He had legitimate excuses however, as the contest was run at a "muddling pace" and he came back from the race a sick horse, with a high temperature. Despite his defeat he was rated the equal best two-year-old (with Legatee) in the Free Handicap on a mark of 126
lbs.
1926: three-year-old season At three, Coronach won the Column Produce Stakes at Newmarket and started "the hottest favourite in years". for the
2000 Guineas. He started slowly and was beaten five lengths by the impressive winner Colorado. Colorado started favourite for the Derby, run in heavy rain which kept away the normally huge crowds. Over one and a half miles Coronach led all the way to reverse the Newmarket form, winning by five lengths "in a canter" from Lancegaye with Colorado third. He was never in danger of defeat in his remaining starts at three. At
Royal Ascot won the St James's Palace Stakes by twenty lengths from Lex. He then won Europe's most valuable flat race, the Eclipse Stakes at
Sandown in July, beating Comedy King by six lengths. According to the
Glasgow Herald "nothing could ever get near him" and Childs spent the closing stages looking round for non-existent dangers. In the St Leger at
Doncaster, Coronach started at odds of
8/15 against eleven rivals. He started slowly, losing four lengths, but soon made up the lost ground and was in a clear lead (estimated at six lengths) by the time the field entered the straight. Childs did not have to put the colt under any pressure as he won by two lengths from Caissot in a record time 3:01.6. The win took Coronach's earnings for the year to over £40,000 and confirmed his status as "the best three-year-old this season."
1927: four-year-old season Although he remained a top class performer at four, Coronach suffered increasingly from respiratory problems which eventually forced his retirement:
George Lambton was reported to have said "It is no secret that Coronach is not sound in his wind." He began the year by leading all the way to beat Embargo and Foxlaw in the Coronation Cup at Epsom in June. His winning time of 2:34.0 was exceptionally fast by Epsom standards. He then won the Hardwicke Stakes at
Royal Ascot by twelve lengths. In a much anticipated rematch with Colorado in the Princess of Wales's Stakes at Newmarket Coronach made the running but was overtaken by his rival a furlong from the finish. He was eased in the closing stages and was beaten eight lengths. In his last race he finished third to Colorado in the Eclipse Stakes, beaten seven lengths. His defeats led to opinions regarding his merit being revised: from being a potential "horse of the century" he was now seen as simply "a good horse." == Assessment ==