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 Mil Guineas was first run in 1980 as a Group 2 race before being upgraded to a Group 1 race in 1982.^[1]

Speed record:

• 1:33.30 – Polvorada (2021)

Largest margin of victory:

• 9 lengths – Giuliet Seattle (2017)

Most wins by a jockey:

• 3 – Jacinto Rafael Herrera (1992, 1997, 2000)
• 3 – Jorge Valdivieso (1995, 1999, 2006)
• 3 – Juan Carlos Noriega (1996, 2005, 2007)
• 3 – Pablo Gustavo Falero (2003, 2008, 2014)
• 3 – Adrian M. Giannetti (2010, 2012, 2023)

Most wins by a trainer:

• 8 – Carlos D. Etchechoury (1995, 1999, 2001, 2004, 2008, 2015, 2022, 2023)
• 4 – Roberto M. Bullrich (2006, 2011, 2013, 2018)

Most wins by an owner:

• 5 – Haras La Biznaga (2006, 2009, 2011, 2013, 2018)
• 3 – Haras Orilla del Monte (1998, 2001, 2004)
• 3 – Haras Santa Maria de Araras (1999, 2008, 2014)

Most wins by a breeder:

• 5 – Haras La Biznaga (2006, 2009, 2011, 2013, 2018)
• 4 – Haras Santa Maria de Araras (1999, 2008, 2010, 2014)
• 3 – Haras Firmamento (2002, 2005, 2017)

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