The Gran Premio Diamante (previously known as the Gran Premio Mil Guineas) is a Group 1 horse race in Argentina run over 1600 meters on the turf at Hipódromo de San Isidro.
It is restricted to three-year-old fillies and is based on the British 1000 Guineas Stakes.
[1] It is the first leg of the San Isidro Filly Triple Crown.
[2] The Gran Premio Diamante was first run in 1980 as a Group 2 race before being upgraded to a Group 1 race in 1982.
[1] In 2024, the race's name was changed from the Gran Premio Mil Guineas to the Gran Premio Diamante.