Maratón Acuática Villa Urquiza-Paraná

The Paraná River flows with a relentless, opaque brown sediment that masks the true depth of its central channel. Swimmers entering the current experience a massive volume of water, where the temperature can shift abruptly near the sediment-heavy banks. Navigating this river requires constant attention to the flow, which acts more like a living conveyor belt than a still body of water, shaped by centuries of seasonal cycles that carry subtropical elements far from their northern origins.

Historical currents and landmarks

As you strike out from Villa Urquiza, you are tracing a path first documented by the Venetian explorer Sebastian Cabot in 1526. The riverbanks along this 21-kilometer stretch are thick with riparian forests, where species like the aguaribay and blanquillo overhang the waterline. Occasionally, the water provides a glimpse of the local wildlife; it is not uncommon to spot capybaras grazing on the muddy shelves or to catch the ripple of an otter. The route eventually passes the proximity of the Raúl Uranga – Carlos Sylvestre Begnis Tunnel, a monumental engineering project finished in 1969 that finally bridged the gap between the Argentine Mesopotamia and the rest of the nation.

A legacy of endurance

This specific course holds a deep resonance with the political transformation of the region, as the surrounding geography played a critical role in the 1852 Battle of Caseros. That turning point, which led to the creation of the modern Argentine Constitution, forever altered the status of these provinces. Swimming here connects you to a long tradition of long-distance river marathons in the Entre Ríos region, such as the annual Piedras Blancas-Hernandarias Marathon. The current race, organized by Andrés Solioz, demands a high degree of physical conditioning due to the river's sheer scale and the unpredictable nature of the downstream push. Competitors must remain vigilant, as the river’s arms and secluded island inlets serve as habitats for the yacaré overo and the yellow anaconda, both of which are native to this complex ecological corridor.