Buenos Aires Marathon

Course & Elevation

The Maratón Internacional de Buenos Aires, also called the 42K de Buenos Aires, is the Argentine capital's marathon, held on a Sunday in September and organised by the Asociación de Carreras y Maratones Ñandú. The city government dates the race to 1984. Start and finish are at Avenida Figueroa Alcorta and Dorrego, in Palermo, and the marathon starts at 07:00 in waves. In 2026 the course ran out past the River Plate stadium in the first section, then towards the city centre and the south of the city before crossing Puerto Madero and returning to the Palermo parks. The route passes the Hipódromo de Palermo, the Recoleta Cemetery, Avenida Corrientes, the Teatro Colón, the Obelisco, the Cabildo, Plaza de Mayo, the Casa Rosada, the Floralis Genérica and the Planetario, on a certified urban course on asphalt. The city government calls the circuit flat and one of the fastest in the region. The 2026 race had a record field of almost 17,000 runners.