Desafio dos Mares

Driving along the coastal road toward Rio das Ostras, the horizon begins to shift as the Atlantic breeze carries the salt spray of the Baixadas Litorâneas. You know you have arrived when the silhouette of the 20-meter long Humpback whale bronze statue emerges at the edge of Costazul beach, a landmark that serves as both a navigator’s guide and a reminder of the scale of these waters. For the open water swimmer, this stretch of the Brazilian coast is defined by its layered history, where the act of swimming becomes a passage through time.

Historical waters and landmarks

As you navigate the course, the seafloor near the local Yacht Club holds the remnants of a more colonial era. Below the surface, the proximity to the historic 18th-century stone well reminds you that this bay was once a critical stopover for vessels requiring fresh water. These ships relied on the well built by enslaved labor, a stark contrast to the leisure of modern nautical activities. The shoreline also whispers stories of the imperial past; it is said that Emperor Dom Pedro II famously sought respite under a centennial fig tree here, a spot that later provided shade for other national figures, grounding the coastal town in a legacy of quiet contemplation before the intensity of a race start.

Race day and environment

Participating in the Desafio dos Mares means navigating an environment where the geography dictates the rhythm. While the coastal waters are the main arena, the nearby Iriry Lagoon offers a distinct natural phenomenon—the 'Coca-Cola Lagoon'—where the dark, iodine-rich water provides a unique contrast to the clarity of the sea. The event, which returns annually, requires swimmers to remain aware of the coastal currents influenced by the 200-meter long Costazul pier. This pier is not merely a concrete structure; it acts as an observation deck where, during the pre-race hours, you can trace the path of your upcoming swim while scanning the distant mountain ranges. The archaeological depth of the area is further evidenced by the Tarioba Sambaqui site, a prehistoric landmark that documents human presence in this region long before the town took its current shape.