Marathon de Buenos Aires

Location: Buenos Aires
Country: Argentina
Website: https://www.maratondebuenosaires.com/
2025 Marathon Date: 21/09/25
2026 Marathon Date: TBC
Winning Time 2025: 02:09:24
% Sub-3s: 2–5%
# Sub-3s: 500–999
Total Runners: 10k–20k

The Buenos Aires Marathon is the largest and most prestigious road race in South America, drawing thousands of runners from across the continent and abroad. Its course is flat and city-centred, designed to showcase the Argentine capital while also providing strong potential for fast times.

The route begins in central Buenos Aires and passes key landmarks, including the Obelisco and Casa Rosada, before extending through wide boulevards and along the Río de la Plata. The profile is one of its defining strengths: flat, broad roads allow for steady pacing and the opportunity to hold rhythm without interruption. For sub-3 athletes, this makes Buenos Aires one of the most reliable options in South America to convert training into a strong performance.

Crowd support is concentrated in central areas and around landmarks, while quieter stretches in outlying sections require focus. Organisation is robust, with regular aid stations and clear course management, reflecting the scale and reputation of the event. The field is large, ensuring good pacing groups for sub-3 targets and beyond.

For those seeking a South American marathon with genuine speed potential, Buenos Aires is the standout choice. It combines a fast, flat course with international-standard organisation, making it the most consistent platform in the region for sub-3 runners.