The Santa Fe–Coronda Marathon (formal name Coronda River Aquatic Marathon; in Spanish: Maratón Acuatíco Río Coronda) is a 57-kilometer open water swimming race that takes place on the Coronda and Salado rivers (both tributaries of the Paraná River) in Argentina.
The race has a total length of about 57 km and an expected run time of about 8 hours.
[1] The first competition took place on 22 January 1961 under the name of "Fluvial Marathon of the Argentine Littoral".
The marathon was not held, due to economic problems and/or varied political troubles, in 1968, 1969, 1971–1973, 1980–1986, and 1989.
The race has been included as part of FINA's Marathon circuit (prior to 2007), and its appropriate successor: the FINA Open Water Grand Prix series.