Idaho (foaled 14 March 2013) is an Irish Thoroughbred racehorse. In four years on the track he raced in seven countries, namely Ireland, France, England, Canada, the United States, Japan and the United Arab Emirates. In 2016 he finished third in The Derby and second in the Irish Derby before winning the Great Voltigeur Stakes. He was the odds-on favourite for the St Leger Stakes but stumbled and unseated his rider. In the following year he ran poorly in the Coronation Cup but then won the Hardwicke Stakes at Royal Ascot and finished third in the King George VI and Queen Elizabeth Stakes. The highlight of his final season was a win in the Ormonde Stakes.