1000 Guineas Stakes 1000 Guineas Stakes The 1000 Guineas Stakes is a Group 1 flat horse race in Great Britain open to three-year-old fillies. It is run on the Rowley Mile at Newmarket over a distance of 1 mile (1,609 metres), and it is scheduled to take place each year in late April or early May on the Sunday following the 2000 Guineas Stakes. It is the second of Britain's five Classic races, and the first of two restricted to fillies. It can also serve as the opening leg of the Fillies' Triple Crown, followed by the Oaks and the St Leger, but
1,000 Guineas Trial Stakes trial for the 1,000 Guineas Stakes. The last horse to win both events was Full Dress in 1969. The equivalent race for colts was the 2,000 Guineas Trial Stakes. 1,000 Guineas Trial Stakes The 1,000 Guineas Trial Stakes was a flat horse race in Great Britain open to three-year-old thoroughbred fillies. It was run over a distance of 7 furlongs (1,408 metres), and it was scheduled to take place each year in early April. The event was originally held at Ascot. The present grading system was introduced in 1971, and the race was classed at Group 3 level. It was