| Tranquil | |
|---|---|
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| Sire | Swynford |
| Grandsire | John O' Gaunt |
| Dam | Serenissima |
| Damsire | Minoru |
| Sex | Mare |
| Foaled | 1920[1] |
| Country | United Kingdom |
| Colour | Bay |
| Breeder | Edward Stanley, 17th Earl of Derby |
| Owner | Lord Derby |
| Trainer | George Lambton |
| Record | 15: 8–1–1 |
| Earnings | £20,707 (1923)[2] |
| Major wins | |
| 1000 Guineas (1923) St Leger (1923) Newmarket Oaks (1923) Jockey Club Cup (1923) | |
| Awards | |
| Biggest prize-money winner in Britain (1923)[2] | |
Tranquil (1920 – October 1938) was a British Thoroughbred racehorse and broodmare. She showed considerable promise as a two-year-old when she won one race and finished second in the Gimcrack Stakes. In the following season she was one of the best horses in Britain, scoring classic victories in the 1000 Guineas and St Leger Stakes as well as winning four other races including the Jockey Club Cup and Newmarket Oaks. She won once in 1924 before her racing career was ended by injury. She made no impact as a broodmare.
- ^ "Tranquil pedigree". Equineline.
- ^ a b Cite error: The named reference
freakwas invoked but never defined (see the help page).