Course & Elevation
The Maratón Internacional de la Bandera, known as the Rosario Marathon, is the main road marathon of Rosario in Argentina, run in June around Flag Day and organised by the Asociación Rosarina de Atletismo. A competitive 10K takes place on the same day, and the races start and finish at the Monumento a la Bandera on the Paraná riverfront. The marathon was conceived in 1999 on the initiative of the Asociación Rosarina de Atletismo and first run in 2002. On the circuit used up to 2026, the first half passed Parque España, turned up Bulevar Oroño towards the Parque de la Independencia, skirted the Marcelo Bielsa stadium, returned along Avenida Pellegrini to the river and went through Parque Urquiza back to the Monument, completing the first 21 km. The second half went north through the Gigante de Arroyito and Parque Alem, with the river on the runners' right for a long stretch. For the 2027 edition, the 25th, the organisers announce a new circuit with World Athletics international certification, which they describe as flat, urban and fast; the route had not yet been published. The marathon starts at 8:00 a.m. In 2026 the race doubled as Argentina's national marathon championship.
Course Facts
Weather
Typical climate for the race month — an estimate, not a forecast or a race-day record
11°C
Temperature
81%
Humidity
15%
Rain Chance
June is winter in Rosario: average highs are around 17 °C and lows around 6 °C, with little rain, on about four or five days of the month, and humidity above 80% on average.
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