IRONMAN New Zealand, an exhilarating and scenic triathlon that takes athletes on a journey through the stunning landscapes of Lake Taupō. SWIM - 3.8km swim in the pristine, clear waters of Lake Taupō. Athletes will enjoy a water temperature of around 19 degrees Celsius (approximately 64 degrees Fahrenheit). The deep-water mass start adds an element of excitement as participants set off on a clockwise course, parallel to the picturesque shoreline. BIKE - Athletes transition to the rolling ...