La Grande Traversée de l'Ouest

La Grande Traversée de l'Ouest is a 10,000m open water event held annually in Mauritius, scheduled for November 1, 2026. The course traverses the lagoon of the west coast, connecting Le Morne to La Preneuse. Participants navigate a protected marine environment that is defined by the proximity of the Le Morne Brabant peninsula. Swimmers are often drawn to this stretch of water for its specific visual characteristics, including the famous optical illusion known as the underwater waterfall, which creates the appearance of deep-sea drop-offs within the coastal shallows. While the lagoon benefits from a distinct micro-climate, the surrounding basaltic monolith and its steep slopes offer a constant point of reference throughout the long-distance effort.

Historical context and the shoreline

The geography of this region is inseparable from its history. The coastline is named after the Dutch East India Company ship Brabant, which ran aground here on December 29, 1783. As you swim, you pass the base of the mountain that served as a refuge for Maroons in the early 19th century. Local lore remains centered on the tragedy of 1835, when a group of former slaves chose to leap from the summit into the ocean to avoid re-enslavement. This history is etched into the landscape, with caves and rocky overhangs still visible from the water line. The peninsula’s status as a UNESCO World Heritage site also ensures that the surrounding ecosystem, including rare endemic flora like the Mandrinette, remains a protected backdrop for the race. For those looking to continue their season, the Défi Eau Libre Casseconfi provides a different challenge in the local waters earlier in September.