# 21K Buenos Aires

The Buenos Aires Half Marathon (official name: 21k Buenos Aires), is an annual road running competition over the half marathon distance 21.0975 kilometres (13.1094 mi) which takes place in Buenos Aires, Argentina in September. The route starts and ends in City Park and winds through the city center.
The 2011 edition of the race hosted the South American Marathon Championships. The race has also hosted the national championships for Argentina, four times for men (1997, 2001, 2015, 2017) and four times for women (1997, 1999, 2001, 2015). The course records are held by Brazilian Marílson Gomes dos Santos (1:01:13) and home athlete Florencia Borelli (1:11:58).

## Past winners

Key:  Course record
| Year | Men's winner | Time (h:m:s) | Women's winner | Time (h:m:s) |
| 1989 | Ricardo Castro (ARG) | 1:04:22 | Ana María Nielsen (ARG) | 1:17:38 |
| 1990 | Leonardo Malgor (ARG) | 1:06:10 | Adriana Calvo (ARG) | 1:20:23 |
| 1991 | Juan Pablo Juárez (ARG) | 1:03:49 | Ana María Nielsen (ARG) | 1:17:29 |
| 1992 | Leonardo Malgor (ARG) | 1:04:11 | Elisa Cobañea (ARG) | 1:15:14 |
| 1993 | Juan Pablo Juárez (ARG) | 1:03:15 | Silvana Pereira (BRA) | 1:13:39 |
| 1994 | Ronaldo da Costa (BRA) | 1:01:05 | Solange de Souza (BRA) | 1:12:21 |
| 1995 | André Luiz Ramos (BRA) | 1:02:03 | Elisa Cobañea (ARG) | 1:14:30 |
| 1996 | Emerson Iser-Bem (BRA) | 1:03:26 | Elisa Cobañea (ARG) | 1:14:35 |
| 1997 | Luiz Carlos da Silva (BRA) | 1:04:03 | Maria das Gracas (BRA) | 1:16:30 |
| 1998 | Luis Santos Ramos (BRA) | 1:05:01 | Lelys Salazar (ARG) | 1:18:12 |
| 1999 | Rómulo W. da Silva (BRA) | 1:06:01 | Mónica Cervera (ARG) | 1:17:39 |
| 2000 | Patrick Boiyo (KEN) | 1:04:57 | Cleusa M. Irineu (BRA) | 1:17:14 |
| 2001 | Angus Cheptot (KEN) | 1:04:42 | Ramilya Burangulova (RUS) | 1:12:59 |
| 2002 | Oscar Cortínez (ARG) | 1:05:40 | Érika Olivera (CHI) | 1:14:51 |
| 2003 | José Luis Luna (ARG) | 1:06:46 | Elisa Cobañea (ARG) | 1:17:10 |
| 2004 | Oscar Cortínez (ARG) | 1:05:09 | Elisabete Ferreira Cruz (BRA) | 1:19:17 |
| 2005 | Oscar Cortínez (ARG) | 1:05:30 | Sandra Torres (ARG) | 1:15:45 |
| 2006 | Oscar Cortínez (ARG) | 1:05:57 | Carina Allay (ARG) | 1:19:05 |
| 2007 | Adriano Bastos (BRA) | 1:06:07 | Sandra Torres (ARG) | 1:19:52 |
| 2008 | Adriano Bastos (BRA) | 1:05:48 | Rosa Godoy (ARG) | 1:16:08 |
| 2009 | Sergio Hoffman (ARG) | 1:10:35 | Sandra Córdoba (ARG) | 1:17:54 |
| 2010 | Jorge Luis Mérida (ARG) | 1:04:48 | Rosa Godoy (ARG) | 1:15:16 |
| 2011 | Marílson Gomes (BRA) | 1:01:13 | Adriana da Silva (BRA) | 1:13:16 |
| 2012 | Elijah Keitany (KEN) | 1:02:30 | Shewarge Amare (ETH) | 1:13:46 |
| 2013 | Kiplimo Kimutai (KEN) | 1:02:57 | Alice Chelangat (KEN) | 1:13:20 |
| 2014 | Matías Roht (ARG) | 1:03:48 | Sandra Amarillo (ARG) | 1:16:51 |
| 2015 | Matías Roht (ARG) | 1:04:12 | Rosa Godoy (ARG) | 1:15:30 |
| 2016 | Diego Elizondo (ARG) | 1:04:39 | Florencia Borelli (ARG) | 1:14:19 |
| 2017 | Paul Lonyangata (KEN) | 1:01:28 | Florencia Borelli (ARG) | 1:11:58 |
| 2018 | Mosinet Geremew (ETH) | 59:48 | Vivian Jeronoi (KEN) | 1:09:08 |
| 2019 | Bedan Karoki (KEN) | 59:05 | Ababel Yeshaneh (ETH) | 1:07:44 |
| 2021 | Fabián Manrique (ARG) | 1:04:42 | Agustina Landers (ARG) | 1:17:22 |
| 2022 | Gerba Dibaba (ETH) | 1:00:29 | Irine Kimais (KEN) | 1:07:59 |
| 2023 | Roncer Konga (KEN) | 59:08 | Ababel Yeshaneh (ETH) | 1:06:10 |
| 2024 | Gerba Dibaba (ETH) | 1:00:24 | Ruth Chepng'etich (KEN) | 1:05:58 |