Traversata del Lago di Pusiano 2026

The waters of Bosisio Parini host the annual swimming challenge on June 27, 2026, featuring three distinct distances of 500, 1200, and 2400 meters. Organized by the local ASD U.S. Bosisio, the event takes place in a basin shaped by the retreat of a massive glacier that once dominated the Brianza landscape. Swimmers navigating the course often find themselves in a natural gym for rowing, as the calm, steady conditions here are chosen by Olympic athletes from nations like Germany and Switzerland for their seasonal training blocks.

Historical currents and landmarks

As you move through the water, you are traversing a volume that shifts between 5.25 and 6.72 square kilometers, a fluctuation caused by seasonal flooding that defines the lake's hydrography. The perimeter of approximately 11 kilometers provides a backdrop rich in local lore; on the southern side of the Island of Cypresses, remains of a Neolithic stilt village dating back to 10,000–15,000 BC rest beneath the surface. This same island, alongside the Beauharnais Palace in Pusiano, served as a private retreat for Eugène de Beauharnais, the Viceroy of the Napoleonic Kingdom of Italy. Historical anecdotes describe the palace architecture with such precision that it was rumored to allow the Viceroy to reach his sleeping quarters on horseback, an adaptation intended to bypass potential threats. Beyond the ruins, the 19th century brought a different kind of notoriety to these shores, when Angela and Teresa Isacchi gained regional prominence for their reported visions and prophecies regarding the collapse of the Austro-Hungarian Empire, drawing travelers from across Europe to the water's edge.

Race day mechanics

The event logistics mandate the use of a safety buoy for all participants, with rental options available for 5€ if you arrive without one. For those managing their early summer schedule, this meeting falls on the same day as the Torno-Blevio-Como crossing, while athletes who prefer the flowing currents of river environments might look toward the Pinnata dell'Adda or the open water challenges found at the Traversata del Lario in July. Online registration remains open until June 25, after which point entry is restricted to on-site procedures. The lake, historically separated from Lake Alserio by sediment deposits from the Lambro River, offers a contained environment where the absence of significant tide-driven currents makes for a predictable, steady swim.