21K de Buenos Aires
Buenos Aires' flagship half pairs a World Athletics Label field with a fast, certified city course that has produced repeated sub-hour racing.
Marathon Scout prioritizes official race websites, registration pages, timing providers, results pages, and race-linked live tracking. Last updated July 17, 2026.
21K de Buenos Aires quick facts
- World Athletics Label race on a certified urban course.
- Start and finish at Avenida Figueroa Alcorta and Dorrego.
- Seeded corrals and a three-hour time limit.
- Minimum age 18.
- Expo pickup is required; there is no standard race-day kit collection.
About the 21K de Buenos Aires
The 21K is the speed-focused companion to the Buenos Aires Marathon and one of South America's deepest road halves. Seeded corrals and a three-hour limit accommodate a broad mass field while preserving a serious race at the front.
21K de Buenos Aires course description
The certified 21.0975-kilometer route runs entirely on city asphalt, starting and finishing at Avenida Figueroa Alcorta and Dorrego. The profile is built for speed, but runners should check the edition-specific map before planning tangents or spectator spots.
Weather for the 21K de Buenos Aires
August is winter in Buenos Aires, so race morning is often cool enough for fast running. Wind and direct sun on the city's broad avenues can still affect pacing once the field spreads out.
Past 21K de Buenos Aires dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, August 23, 2026 | — | — |
| 2025 | Sunday, August 24, 2025 | Completed | Open results |
| 2024 | Sunday, August 25, 2024 | Completed | Open results |
21K de Buenos Aires FAQ
When is the 21K de Buenos Aires?
The 2026 21K de Buenos Aires is on Sunday, August 23, 2026.
How do I register for the 21K de Buenos Aires?
You can register for the 21K de Buenos Aires at ticketear.com.ar.
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