Buenos Aires Half Marathon
Race Day Weather
Cool start, steady finish
Runners will face a temperature rise from 45°F at the start to 52°F by the finish, with a light wind from the southeast. Humidity at 63% suggests mild discomfort, but with no rain expected, conditions remain favorable. The toughest segments occur in miles 3-6 and 8-9 due to headwinds, so a conservative pace strategy is recommended during these stretches.
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Race Info
The Buenos Aires Half Marathon (Medio Maraton de Buenos Aires, also called 21K de Buenos Aires) is a World Athletics Label road race held annually in Buenos Aires, Argentina, organized by Carreras y Maratones Nandu. The 21.1K course starts and finishes at Avenida Figueroa Alcorta and Dorrego in the Palermo neighborhood, following Avenida 9 de Julio and Avenida Libertador. Ethiopia's Yomif Kejelcha set the men's world half marathon record at the 2026 edition, running 56:51, and Fotyen Tesfay Haiylu set the women's course record the same day at 1:03:57.