| Class | Group 2 |
|---|---|
| Location | Caulfield Racecourse, Melbourne, Australia |
| Inaugurated | 1983 |
| Race type | Thoroughbred |
| Sponsor | Manhari Metals (2025) |
| Race information | |
| Distance | 1,400 metres |
| Surface | Turf |
| Qualification | Three year old fillies |
| Weight | Set weights with penalties |
| Purse | $300,000 (2025) |
| Bonuses | Winner is exempt from ballot for Caulfield Guineas and The Thousand Guineas |
The Thousand Guineas Prelude, registered as the Tranquil Star Stakes, is a Melbourne Racing Club Group 2 Thoroughbred horse race, for three year old fillies, at set weights with penalties, over a distance of 1400 metres, held annually at Caulfield Racecourse, Melbourne, Australia in late September. Total prize money for the race is A$300,000. [1] This event is a preparation race for the prestigious Group 1 The Thousand Guineas later in October at Caulfield. [1]
The registered name of the race is named after Australian Hall of Fame champion mare from the 1940s Tranquil Star.
The following horses have won The Thousand Guineas Prelude then gone on to win The Thousand Guineas: Bianca Flyer (1987); Azzurro (1992); Miss Finland (2006); Irish Lights (2009)
1st of 16 CAUL 20Sep98 1400m Soft5 TQUIL STAR Listed $76,000 ($49,750) Damien Oliver 57.5kg Barrier 7 2nd Visual Displays 55kg, 3rd Oaks Dream (NZ) 55kg 1:23.95 (600m 36.07), 0.8L, 9th@800m, 8th@400m, 4-1/6-1/5-1