日月潭萬人泳渡

Water temperatures in Sun Moon Lake typically hover around 24°C during the mid-September race window. This alpine reservoir is characterized by its stability; since the lake is enclosed by the mountains of Nantou, swimmers encounter minimal wave action, allowing for a steady, rhythmic stroke throughout the 3-kilometer crossing. While the surface remains calm, participants must navigate around the occasional presence of non-native giant snakehead, an invasive species that local associations manage through ongoing eradication efforts. The course, stretching from the Ita Thao pier to the Shuishe pier, serves as an aquatic passage through the heart of Taiwan's indigenous history and modern geological shifts.

Historical markers in the water

As you sight your line, the landmarks provide a tangible connection to the region's past. The route passes near the remnants of Lalu Island; once a significant landmass that defined the lake’s dual-crescent shape, much of its surface area succumbed to the 1999 Jiji earthquake. This event also claimed the wedding pavilion that previously sat on the island’s edge, leaving only the marble white deer statue—a nod to the Thao people’s origin legend—as a visible sentinel for those swimming by. Further along the trajectory, the shoreline reveals the architecture of the Hanlai Sun Moon Lake hotel, which sits on the precise site of the former residence used by Chiang Kai-shek after the Nationalist government's relocation. Looking toward the higher elevations, the Tzu-En Pagoda, commissioned by the former president in 1971 to honor his mother, remains a focal point on the horizon, anchoring the swimmer’s perspective against the surrounding peaks.

Race day logistics

Since its inception in 1983, the Sun Moon Lake International Swimming Carnival has grown into a major event, often aligning with the Mid-Autumn Festival and drawing massive crowds. The logistics are scaled to accommodate thousands of participants, requiring a structured approach to water safety and timing. Each swimmer is issued a timing chip and a specific cap to ensure accurate tracking across the 3000-meter course. The Puli Four-season Swimming Association coordinates the event, managing the complex interface between the intense volume of entrants and the lake’s protected status. Given the scale of the gathering, the start is strictly managed to balance participant flow with the operational constraints of the piers, ensuring that the mass-participation format remains both safe and fluid for every swimmer involved.