The cannon blast echoes across Piazza San Marco at dawn, sending 8,000 runners on a time-traveling sprint through Byzantine, Gothic and Renaissance Venice. The 2025 marathon introduces a revolutionary change: the course now includes a 300-meter wade through ankle-high acqua alta near Punta della Dogana.
Local Secret: The true finish line is at tiny Osteria al Squero, where your medal gets you a free plate of spaghetti al nero di seppia.