Photo by leonardo samrani from rosario, argentina via Wikimedia Commons, CC BY 2.0
Argentina › Buenos Aires › Races
Maratón Internacional de Buenos Aires
Marathon in Buenos Aires, normally held in September. A flat marathon course — Flat, fast loop through Palermo, Puerto Madero and San Telmo.
El Maratón Internacional de Buenos Aires de un vistazo
| Distancias | Marathon |
|---|---|
| Distancia principal | 42.2 km (marathon) |
| Se celebra | September |
| Recorrido | Llano |
| Ciudad | Buenos Aires, Argentina |
| Condiciones típicas | 17.9°C high / 10.8°C low, rain on ~21% of days |
Flat, fast loop through Palermo, Puerto Madero and San Telmo.
Cómo inscribirse en el Maratón Internacional de Buenos Aires
Entry fees, closing dates and start times are set by the organiser and change every year, so they are not reproduced here — a stale deadline is worse than none. The organiser’s own site and its social channels are the authoritative source for the current year, and are where entry opens.
What is stable, and what this page covers: the month the race is held, what the course is like, the conditions you should expect, and how long a build-up the distance needs.
El tiempo en ediciones anteriores del Maratón Internacional de Buenos Aires
Across the last ten years, Buenos Aires in September has averaged a daily high of 17.9°C and a low of 10.8°C, with at least a millimetre of rain on about 21% of days.
These are recorded observations for the race month averaged over ten years, not a forecast and not a single past race day — race dates move, so one day’s figures would mislead. Source: Open-Meteo historical archive.
Cómo prepararse para el Maratón Internacional de Buenos Aires
How long to train
Build for 16 to 20 weeks from a base you already hold rather than from nothing. For marathon the block should peak at a longest run of 30–32 km, reached at least two weeks before race day so there is time to taper. Three weeks of taper is standard: cut volume by roughly a third each week while keeping some race-pace work so the legs stay sharp.
Training for this course
The course is flat, which means no downhill sections to give your legs a break — you hold one rhythm the whole way. Train on similarly flat ground so the repetitive loading is not a surprise, and practise holding goal pace for long stretches rather than surging.
Conditions in September
Conditions are usually good for racing: highs average 17.9°C and lows 10.8°C in September, which is close to ideal for marathon running. Dress for the temperature about ten degrees warmer than it actually is, since you will warm up within two kilometres.
Fuelling
Over 42 km you will need 30–60 g of carbohydrate an hour from early on, not once you feel empty. Rehearse the exact products in training — the gut trains like anything else — and check in advance which brand is handed out on course, because switching to an unfamiliar one mid-race is a common and avoidable mistake.
Race week
Sleep matters most two nights before, not the night before, so protect that one. Keep eating normally with a modest tilt toward carbohydrate, lay out kit the night before, and do nothing new: no new shoes, no new breakfast, no new socks. Plan to arrive at the start with time to spare — marathon fields move slowly through bag drop and security.
Distancias y dónde se corre
- Marathon — 42.2 km
The pin marks Buenos Aires city centre, the area the Maratón Internacional de Buenos Aires starts and finishes in. This is not the course line: the route is set by the organiser and changes between editions, so the official course map for the current year is theirs to publish. The routes below are for training on the same roads.
Train on these roads: 10K routes in Buenos Aires · long runs in Buenos Aires · GPS art routes
Otras carreras en Buenos Aires
- Media Maratón de Buenos Aires — Half marathon, August