The Gran Premio 25 de Mayo (previously Premio San Isidro, Gran Premio San Isidro, Gran Premio Internacional 25 de Mayo) is a Group 1 horse race run at Hipódromo de San Isidro, in Buenos Aires, Argentina.
Since 2012, the winner receives a “Win and You're In” berth into the Breeders' Cup Turf through the international Breeders' Cup Challenge.
History The Gran Premio 25 de Mayo was inaugurated in 1936 as the Premio San Isidro. It became the Gran Premio San Isidro in 1951 and was renamed the Gran Premio 25 de Mayo in 1959, although it ran as the Gran Premio Internacional 25 de Mayo 1960–1963.
Until 1959, the Gran Premio 25 de Mayo was run at a distance of 3000 meters; this was reduced to its current length of 2500 meters in 1960. From 1951 until its distance reduction, the fastest time run was 3:05 by Yatasto in 1953.
Records Speed record since 1989:
2:23.57 – Seaborg (1996)
Most wins:
3 – Ordak Dan (2013, 2015, 2017) 2 – Mangangá (1954, 1955) 2 – Arturo A. (1961, 1962) 2 – Sea Girl (1997, 1998)
Most wins by a jockey since 1989:
4 – Juan Carlos Noriega (2004, 2008, 2011, 2023) 3 – Juan José Paulé (1991, 1995, 1996) 3 – Pablo Gustavo Falero (1992, 1993, 2001) 3 – Jorge Antonio Ricardo (2015, 2016, 2019)
Most wins by a trainer since 1989:
5 – Alfredo F. Gaitán Dassie (1991, 1996, 1997, 1998, 2023) 4 – Carlos D. Etchechoury (1994, 2016, 2025, 2026)
Most wins by an owner since 1989:
3 – Misterio (GGUAY) (2013, 2015, 2017) 3 – Rio Claro (SI) (1996, 1997, 1998)
Most wins by a breeder since 1989:
3 – Haras Santa Maria de Araras (2010, 2011, 2021) 3 – Haras Caryjuan (2013, 2015, 2017)
Greatest winning margin since 1989:
12 lengths – Sir Winsalot (2014)
Winners since 1989 +Winners of Gran Premio 25 de MayoYearWinnerAgeJockeyTrainerOwnerBreederMarginTimeRef2026Magnum Fifth4Adrian M. GiannettiCarlos D. EtchechouryStud La RayaHaras Santa Maria de Araras1 lengths2:28.302025Honest Boy3Eduardo Ortega PavónCarlos D. EtchechouryHaras El Angel De VeneciaHaras Santa Maria de Araras1 lengths2:33.442024Full Keid3Brian Rodrigo EnriqueDiego PeñaStud Haras Gran MuñecaStud Haras Gran Muñeca neck2:28.862023Menino do Rio3Juan Carlos NoriegaAlfredo F. Gaitán DassiéStud RDI (SI)Haras Rio Dois Irmaos S.R.L.2 lengths2:37.592022Durazzo3Gustavo Emiliano CalventeRuben Alejandro QuirogaMarias del SurMarias del Sur5 lengths2:30.172021Village King6Adrian Maximiliano GiannettiJuan Manuel EtchechouryHaras El Angel de Venecia (SFE)Haras Santa Maria de Araras neck2:30.2720202019Glorious Moment3Jorge Antonio RicardoJuan Manuel EtchechouryHaras Las MonjitasHaras El Gusy1 lengths2:35.612018La Extraña Dama ƒ4Eduardo Ortega PavónJosé Cristoba BlancoHaras de La PommeHaras de La Pomme4 lengths2:31.342017Ordak Dan8Eduardo Ortega PavónJuan Carlos H. EtchechouryMisterio (GGUAY)Haras Caryjuan3 lengths2:38.642016Don Inc3Jorge Antonio RicardoCarlos D. EtchechouryHaras Las MonjitasHaras La Biznaga6 lengths2:27.452015Ordak Dan6Jorge Antonio RicardoJuan Carlos H. EtchechouryMisterio (GGUAY)Haras Caryjuan1 lengths2:27.142014Sir Winsalot3Altair DomingosJosé Luis PalaciosMirkoDon Yeye12 lengths2:32.362013Ordak Dan4Pablo Damián CarrizoCarlos A. CarabajalMisterio (GGUAY)Haras Caryjuan length2:29.342012Al Qasr4Crisostomo Carlos TrujilloJuan Suarez VillarroelSoribelKathryn S. West2 lengths2:34.512011Vitaminado3Juan Carlos NoriegaJuan Sebastian MaldottiHaras Santa Maria de ArarasHaras Santa Maria de Araras neck2:33.252010Fuego e Hierro3Edwin Rafael Talaverano CardenasConrado Antonio LinaresAlfa (LP)Haras Santa Maria de Araras2 lengths2:35.602009Escamonda3Edwin Rafael Talaverano CardenasMiguel Ángel GarcíaRogo (LP)Haras Viejo TomboHead2:26.002008Body Soguero3Juan Carlos NoriegaFederico MartucciFejiparmaHaras Chimpay6 lengths2:24.352007Coquelize5Mario Luis LeyesMarcelo S. SueldoLos LuisesHaras Abolengo neck2:24.352006Flag's Boy5Mario Luis LeyesOscar R. MansillaLa Reina Mora (LP)Juan Carlos Bonelli3 lengths2:25.992005El Lunicornio4Jacinto Rafael HerreraG. Frenkel SantillánHaras Santa PaulaHaras El Galo6 lengths2:24.902004Jungle Fitz3Juan Carlos NoriegaRoberto PellegattaCris-Fer (LP)Haras Firmamento length2:27.802003Genereux3Julio César MéndezAlves José MartinsHaras La ProvidenciaHaras de Camargo José Laudo2 lengths2:29.562002Miss Carry ƒ3Edgardo GramáticaMiguel Ángel GarcíaHaras FirmamentoHaras Firmamento length2:29.462001Campesino3Pablo Gustavo FaleroJuan Esteban BianchiCaballeriza Starlight (LP)Haras La Colina2 lengths2:27.862000Potriwish3Horacio E. KaramanosJosé Luis PalaciosNuevo Milenio (SI)Haras La Madrugada1 lengths2:27.361999Ixal3Daniel Jorge OjedaNahuel OrlandiChichin (LP) (SI)Haras El Paraíso1 lengths2:24.871998Sea Girl ƒ6Rubén Emilio LaitánAlfredo F. Gaitán DassiéRio Claro (SI)Hill 'N' Dale Farm1 lengths2:29.191997Sea Girl ƒ5Rubén Emilio LaitánAlfredo F. Gaitán DassiéRio Claro (SI)Hill 'N' Dale Farm length2:25.701996Seaborg4Juan José PauléAlfredo F. Gaitán DassiéRio Claro (SI)Haras El Alfalfar length2:23.571995El Florista4Juan José PauléEduardo M. Martínez De HozJ.S.A. (SI)Haras de La PommeNose2:24.61994Double Paid4Juan A. MacielCarlos D. EtchechouryHaras VacaciónHaras Vacación length2:27.01993Prince Boy3Pablo Gustavo FaleroJuan Carlos MaldottiSan José del SocorroJorge Eugenio Tavares1 lengths2:28.01992Potrillon3Pablo Gustavo FaleroJuan Carlos MaldottiCaballeriza ToriHaras La Madrugada2:27.01991Ski Champ5Juan José PauléAlfredo F. Gaitán DassiéCaballeriza EFE-GE (SI)Fontainebleau Farm, Inc2:26.61990Romance Moro5Jorge ValdiviesoJosé JuriLos MorosJosé Juri2:25.41989Rial3Natalio Domingo MezzoteroCarlos A. FerroCaballeriza E.C.B.Haras Congreve2:26.41988Pranke3Oscar Leopoldo ZapataJuan Alberto MaldottiHaras La TitinaHaras La Titina3 lengths ƒ Designates a filly or mare
Earlier winners
1936: Camerino 1937: Okay 1938: Taitú ƒ 1939: Bon Vin 1940: Judea ƒ 1941: El Chato 1942: Banderín 1943: Gaztambide 1944: Enojo 1945: Cololó 1946: Sospiro 1947: Bambino 1948: Equinox 1949: Suspect 1950: Eastbury 1951: Foxona ƒ 1952: Pretexto 1953: Yatasto 1954: Mangangá 1955: Mangangá 1956: Montmartre 1957: Solito 1958: Carlinga ƒ 1959: La Rubia ƒ 1960: Escorial 1961: Arturo A. 1962: Arturo A. 1963: Dorine ƒ 1964: Doretta ƒ 1965: Charolais 1966: Luciano Diez 1967: Gobernado 1968: Azincourt 1969: Indian Chief 1970: Up 1971: Borobeta 1972: El Virtuoso 1973: Redtop 1974: Circinus 1975: Keats 1976: Contraventora 1977: Dioico 1978: Mister Brea 1981: Campero 1982: New Dandy 1983: Juez de Pan 1984: New Dandy 1985: Reverente 1986: Newmarket 1987: Nuevo Poderoso
ƒ indicates a filly/mare
References