The Leopardstown Derby Trial, currently run as the Cashel Palace Hotel Derby Trial, is a Group 3 flat horse race in Ireland open to three-year-old thoroughbreds.
It was named after Nijinsky, the previous year's Irish-trained English Triple Crown winner.
[1] Derrinstown Stud's sponsorship ended after the 2021 race and there was no sponsor in 2022 or 2023.
The last winner to achieve victory in the Irish Derby was Los Angeles in 2024.
The title "Nijinsky Stakes" was later assigned to a different race at Leopardstown, a Listed event for three-year-olds in June which is now run as the King George V Cup.