Maratón de Rosario
The Lowdown
The Maratón de Rosario is Argentina's national marathon championship race, held each June on the banks of the Paraná River in the birthplace of the Argentine flag. Known locally as the 42K Rosario, the flat Pampas course starts and finishes at the iconic Monumento a la Bandera — a colossal national flag memorial that towers over the city's waterfront — and winds through the tree-lined Boulevard Oroño and the expansive Parque Independencia before tracing sections of the scenic Costanera riverside promenade. Held over Flag Day weekend, the race draws competitive Argentine runners alongside recreational participants in what has become one of the country's most prestigious road races. The championship status elevates the competition significantly, with national title contenders pushing the pace at the front. June in Rosario means mid-winter conditions — crisp mornings around 5-14°C — which are excellent for marathon racing on this pancake-flat course through Argentina's third-largest city. With approximately 2,700 runners and passionate local spectators, the atmosphere is intimate but spirited. A medical certificate dated within 30 days of race day is mandatory for all participants, as is standard for Argentine road races. Rosario's excellent steak restaurants, affordable hotels, and riverside cultural scene make it a rewarding destination.
Race Day
Weather Forecast
Elevation
Terrain Profile
Relatively flat course
Participants
Field Size
Medium-sized race
Crowd Rating
Spectator Support
Good crowd energy
Rosario Named Host of Argentine National Marathon Championship 2026
Dec 1, 202542K Rosario will serve as the Campeonato Nacional de Maraton 2026, making it a championship-level event.
Boston Qualifier
This race is a certified Boston Marathon qualifying event. Achieve your qualifying standard here on a verified course.
Monumento a la Bandera - Start and finish at Rosario's iconic National Flag Memorial
Boulevard Orono - Tree-lined boulevard through the heart of the city
Parque Independencia - Large urban park along the course
Costanera del Parana - Scenic riverside promenade along the Parana River
Other distances available during the event weekend:
Rosario, Argentina
AR
Average rate for 3-star accommodations near the start line
Eligibility
- Must be 18 years or older on race day
- Must present valid medical certificate
Required Documents
- Valid photo ID (DNI for Argentines, passport for foreigners)
- Medical certificate of fitness (apto medico) dated within 30 days of race day
- Signed waiver of liability
Entry Methods
- Online Registration via 42krosario.com.ar
Cancellation & Refund Policy
No refunds after registration
Transfers to other runners not permitted
Campeonato Nacional de Maraton 2026
AIMS certified course
Flat course through the city of Rosario
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