Medio Maratón de Buenos Aires
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Aug 22, 2027
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The Buenos Aires Half Marathon, also known as the Medio Maratón de Buenos Aires or the 21K de Buenos Aires, is the Argentine capital's annual 21.0975 km road race, held on a Sunday in late August and organised by Asociación Ñandú. The first edition was run on 28 July 1989, with 247 runners in the main race, on the initiative of the former Olympic athlete Domingo Amaison. Start and finish are on Avenida Figueroa Alcorta at Dorrego in Palermo, and in 2026 the race started at 08:00. The route runs from the Bosques de Palermo into the city centre, passing Plaza de Mayo, Paseo Colón and Avenida 9 de Julio, then returns north through Recoleta and along Avenida del Libertador to the finish. The race has World Athletics Label status and serves as a curtain-raiser to the Buenos Aires Marathon in September. The organisers call it the fastest half marathon circuit in the Americas. More than 31,000 runners took part in 2026, a record for the race. On 23 August 2026 Ethiopia's Yomif Kejelcha won in 56:51, a time reported as a world record and awaiting ratification, and his compatriot Fotyen Tesfay won the women's race in 1:03:57; both are course records. The next edition is scheduled for 22 August 2027.
Typical climate for the race month — an estimate, not a forecast or a race-day record
Late August is winter in Buenos Aires: average highs are about 18°C and lows about 9°C, and it rains on roughly seven days of the month; the race starts at 08:00.
The Race
Buenos Aires
The race was the idea of the former Olympic athlete Domingo Amaison, who wanted a half marathon on the city's sporting calendar. It was first run on 28 July 1989, when only 247 athletes started the main race. It was originally named the Medio Maratón Adidas de la Argentina after its sponsor.
On 23 August 2026 Yomif Kejelcha of Ethiopia won in 56:51, 29 seconds faster than the previous world record, pending World Athletics ratification. He broke away from the leaders near the seventh kilometre and ran most of the race alone, finishing almost two and a half minutes ahead of the next runner. Fotyen Tesfay won the women's race in 1:03:57, the fastest time by a woman on Argentine soil.
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00:56:51
Yomif Kejelcha (2026)
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